Ran into a guy yesterday who claimed he frequently rides with SRAM employees and mentioned that apparently most people like the Maven Bases the most. Or even running a Maven lever with a Level caliper.
Definitely third hand info but I thought it was interesting.
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s on my short travel bike, V4s on the long travel bike for consistency, but recently swapped the short travel bike to DHR Evo Pros (after various issues with the E4s over a few seasons), and expected to want to switch the long travel ASAP. However, I’ve still been totally content with the V4 in the way I never was on the E4. Besides for the obvious increase in power, is there a feel difference between the E4 and V4 caliper that might explain why I like the V4 better?
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s...
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s on my short travel bike, V4s on the long travel bike for consistency, but recently swapped the short travel bike to DHR Evo Pros (after various issues with the E4s over a few seasons), and expected to want to switch the long travel ASAP. However, I’ve still been totally content with the V4 in the way I never was on the E4. Besides for the obvious increase in power, is there a feel difference between the E4 and V4 caliper that might explain why I like the V4 better?
Not really, e4 tend to have a shorter free stoke and a more defined bite point
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s...
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s on my short travel bike, V4s on the long travel bike for consistency, but recently swapped the short travel bike to DHR Evo Pros (after various issues with the E4s over a few seasons), and expected to want to switch the long travel ASAP. However, I’ve still been totally content with the V4 in the way I never was on the E4. Besides for the obvious increase in power, is there a feel difference between the E4 and V4 caliper that might explain why I like the V4 better?
Not really, e4 tend to have a shorter free stoke and a more defined bite point
Interesting! Somehow I could swear it was the opposite. That said, I’m a bit of a brake dragger so maybe it’s just that the V4s let me sit in the dead stroke a little bit.
The new vented rotors look sick. I wonder if they work with the Tech4 V4, (I know they mentioned it was developed specifically for the v6ti), but the tech 4 v4 was the last brake to support the 3.3mm vented rotor spec. Seems the newer GR4 and TR4s dropped that.
If I didn't have my trinity set, I'd buy them with the vented 220mm rotors. Have no real use on my skill level to actually benefit from them, but damn I find it hard to restrain myself.
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm really quite impressed with the Mavens. I had to do a bleed on the rear but according to the shop that's standard on new bikes.
Have I got lucky, or are they actually not all bad at all?
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm...
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm really quite impressed with the Mavens. I had to do a bleed on the rear but according to the shop that's standard on new bikes.
Have I got lucky, or are they actually not all bad at all?
how do you feel the power compared to the cura? you had cura 4?
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm...
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm really quite impressed with the Mavens. I had to do a bleed on the rear but according to the shop that's standard on new bikes.
Have I got lucky, or are they actually not all bad at all?
I was also on Cura 4 prior to installing Mavens. I love how I don't have to squeeze the lever super hard anymore.
My Mavens require quite a lot of maintenance, though, so coming from Curas where I rarely if ever had to bleed them, it's a downside.
how do you feel the power compared to the cura? you had cura 4?
Cura 2. Much more power but not surprising. I went from Cura 2 (which I didn’t really have any major complaints with in terms of power) to DHRs. Main issue I had with the DHRs is the free stroke which the Mavens don’t have. Power was good though. Mavens seem to be another level though.
What kind of maintenance? Bleeds or sticky pistons? I had Codes before which were fine apart from repeated sticky pistons.
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do...
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when you open the lever bleed port for an oil top off.
Is this maybe what is happening, or is it obvious that you have a mushy lever and have air entering the system somehow?
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do...
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when...
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when you open the lever bleed port for an oil top off.
Is this maybe what is happening, or is it obvious that you have a mushy lever and have air entering the system somehow?
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I had to re-bleed them every three to four months - this interval seemed to get smaller and smaller though. It never correlated with the pad wear, and was usually a lever going all the way to the bar. Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation.
Anyway, I've got new calipers and lever rebuild kits so that will hopefully be fixed one way or another.
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do...
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when...
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when you open the lever bleed port for an oil top off.
Is this maybe what is happening, or is it obvious that you have a mushy lever and have air entering the system somehow?
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I...
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I had to re-bleed them every three to four months - this interval seemed to get smaller and smaller though. It never correlated with the pad wear, and was usually a lever going all the way to the bar. Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation.
Anyway, I've got new calipers and lever rebuild kits so that will hopefully be fixed one way or another.
Are you torquing the Lever/hose nut? Mavens Require this and its very important or the brakes will never stay good.
I've not needed to bleed mine in 10 months, 3/4 sets of pads on an ebike, just clean pistons and push them back for new pads, set gap with little spacer and go.
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do...
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when...
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when you open the lever bleed port for an oil top off.
Is this maybe what is happening, or is it obvious that you have a mushy lever and have air entering the system somehow?
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I...
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I had to re-bleed them every three to four months - this interval seemed to get smaller and smaller though. It never correlated with the pad wear, and was usually a lever going all the way to the bar. Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation.
Anyway, I've got new calipers and lever rebuild kits so that will hopefully be fixed one way or another.
"Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation."
I've battled this on a few pairs of maven's and it simply means your bleed procedures are not working with the maven's. I am stopping short of saying that your bleed procedures are bad or incorrect... I had zero issues bleeding all types of mtb brakes for the better part of 22ish years prior to mavens. However, I had the same problem on 2 sets of mavens where they would be fine at sea level (where I live) and then would in-explicably pull to the bars when I would go to mammoth, snow summit or N*. Eventually, I dialed in my bleed procedures and process and those brakes are fine.
There are endless explanations and videos of how to bleed mavens. for me my advice to you would be the following:
-use a bleed cup at the lever and not a dual syringe. I use this metal one i got from ali-express that's pretty rad
-Be very careful to un-stick the plungers/pistons in the syringes prior to filling them. The thicker maxima mineral oil will hold air bubbles in it if you aerate it during the bleed process. Take the bleed syringes apart before filling them, get the o-rings wet with mineral oil and make sure that you do not have work hard to get them moving while filling them. If it this does happen, let the syringe sit for 30-60 minutes, with the hose pointed up right to let all of the air settle
-Ensure you do not pull too much vacuum with the syringes and pull air past the syringe orings during the bleed process
-I use a toe clip to pressurize the system and let it sit for a while (an hour is enough ime) as a part of the bleed process, with the bleeding edge port closed
-use a massage gun to get all of the air out of the lines, calipers and levers as the thicker fluid lets bubbles sit in weird places. I also flick the levers on the MCs to get some bubbles to break free out of the lever assemblies
Admit defeat and be ready to re-start the bleed process if anything seems off. Lastly, extend the reach adjuster all the way out, so you can ensure the pistons are pushing as far out into the bleed block as possible. I love my maven's, but the bleed process took a while to dial in, and yes, they need a bit more looking after then codes, trp's or other previous gen brakesets. #worthit however
I've found my self now owning a few different set of brakes now and looking at some frankenbrake set ups. Maven Base came on my new bike and I have two sets of Lewis LH4 on other bikes. I also have a set of the Lewis one to one copies of the Direttissima lever that was only released in China before the adopted the 'Leiws' branding and released the LH4 etc globally
I was pleasantly surprised by the nice lever feel on the Maven Base. The bite point feels nice, crisp and solid.
I'm thinking about trying the Lewis LH4 levers connected to the Maven Base calipers. The LH4 lever has a 9mm master piston diamter, so if the Maven lever is still 9.5mm then it should in theory increase the power but the lever feel will likely change. I'd suspect it wont feel as solid at the bite point but the lever throw should be fairly minimal.
That brings me to the question of oil volume in the master cylinders. The Maven levers 'look' bigger but not sure if they actually hold more volume than the Lewis levers. Has anyone seen any numbers on oil volume of either levers?
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.
I snuck an order in, hopefully they aren't region locked to prevent sending to the US. Some are claiming the next batch is sold out until the second batch in September, so we'll see if I actually get them or not.
Rotor availability seems weird, also. I was only able to get the brakes, but hopefully I can find some rotors as well.
Also if anyone missed it, there was a spy shot in the rumors thread that appeared to be new Dominions
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.I snuck an order in, hopefully...
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.
I snuck an order in, hopefully they aren't region locked to prevent sending to the US. Some are claiming the next batch is sold out until the second batch in September, so we'll see if I actually get them or not.
Rotor availability seems weird, also. I was only able to get the brakes, but hopefully I can find some rotors as well.
Also if anyone missed it, there was a spy shot in the rumors thread that appeared to be new Dominions
Just came on here to ask if anyone had seen updates on the Brembos. What site did you order from? I want to try to snag some asap as well.
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.I snuck an order in, hopefully...
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.
I snuck an order in, hopefully they aren't region locked to prevent sending to the US. Some are claiming the next batch is sold out until the second batch in September, so we'll see if I actually get them or not.
Rotor availability seems weird, also. I was only able to get the brakes, but hopefully I can find some rotors as well.
Also if anyone missed it, there was a spy shot in the rumors thread that appeared to be new Dominions
Just came on here to ask if anyone had seen updates on the Brembos. What site did you order from? I want to try to snag some...
Just came on here to ask if anyone had seen updates on the Brembos. What site did you order from? I want to try to snag some asap as well.
I ordered from LordGun, I had good luck with them in the past.
There were a few others that had them, but some (Flow Suspension) didn't seem setup to ship overseas and others claimed they were sold out of allocations until September.
LordGun has been great for me in the past, but they also aren't clear if they are actually showing up in July. The site claims a July 6th ship date, but we'll see if that holds true or not. Point being, order at risk of a several month delay.
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.I snuck an order in, hopefully...
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.
I snuck an order in, hopefully they aren't region locked to prevent sending to the US. Some are claiming the next batch is sold out until the second batch in September, so we'll see if I actually get them or not.
Rotor availability seems weird, also. I was only able to get the brakes, but hopefully I can find some rotors as well.
Also if anyone missed it, there was a spy shot in the rumors thread that appeared to be new Dominions
I ordered from LordGun, I had good luck with them in the past. There were a few others that had them, but some (Flow Suspension) didn't seem...
I ordered from LordGun, I had good luck with them in the past.
There were a few others that had them, but some (Flow Suspension) didn't seem setup to ship overseas and others claimed they were sold out of allocations until September.
LordGun has been great for me in the past, but they also aren't clear if they are actually showing up in July. The site claims a July 6th ship date, but we'll see if that holds true or not. Point being, order at risk of a several month delay.
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?Going by this...
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?
I've found my self now owning a few different set of brakes now and looking at some frankenbrake set ups. Maven Base came on my new bike and I have two sets of Lewis LH4 on other bikes. I also have a set of the Lewis one to one copies of the Direttissima lever that was only released in China before the adopted the 'Leiws' branding and released the LH4 etc globally
I was pleasantly surprised by the nice lever feel on the Maven Base. The bite point feels nice, crisp and solid.
I'm thinking about trying the Lewis LH4 levers connected to the Maven Base calipers. The LH4 lever has a 9mm master piston diamter, so if the Maven lever is still 9.5mm then it should in theory increase the power but the lever feel will likely change. I'd suspect it wont feel as solid at the bite point but the lever throw should be fairly minimal.
That brings me to the question of oil volume in the master cylinders. The Maven levers 'look' bigger but not sure if they actually hold more volume than the Lewis levers. Has anyone seen any numbers on oil volume of either levers?
This was actually quite amazing in terms of performance.
Anyone that likes and feels the need for the power that the Mavens provide, but doesn't like the heavy lever pull feel of the Maven lever, needs to get on this set up.
The Lewis lever reduced the lever pull feel by over 50% without any noticeable draw backs that I experienced.
I was able to get a super tight free stroke (to the point I ended up reducing my reach by 5mm) and pad/piston retraction was better due to the Lewis LHP lever pushing and pulling more fluid due to the larger piston in the master.
I ended up going back to a full Lewis brake pretty quickly for a few reasons.
1. I had a bit of a problem with the rear maven caliper pistons, needing to "massage" the pistons and getting the lazy ones to free up. This is normal, but the closed in design of the Maven caliper makes it much more difficult to see, adjust, push pistons back and work on in general.
2. Bottom loading pads are pretty much a no deal for me, as I like to clean pistons, adjust and check pad flatness often and having to remove wheels every time is just an inconvenience.
3. I like having the same components/ set ups and feel on all of my bikes, and I'm not keen on buying twice the amount of brakes as I need.
4. The power the LHT brakes provide is still plenty good enough and the weight saving to the unsprung mass is always a bonus.
If you already have Mavens, and don't like the heavy lever pull, reach out to Lewis as they sell levers and parts separately.
Hopefully some produces a brake soon with light lever feel and Maven power (or stronger with good modulation) @lewisbike_official 😳
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?Going by this...
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?
I've found my self now owning a few different set of brakes now and looking at some frankenbrake set ups. Maven Base came on my new bike and I have two sets of Lewis LH4 on other bikes. I also have a set of the Lewis one to one copies of the Direttissima lever that was only released in China before the adopted the 'Leiws' branding and released the LH4 etc globally
I was pleasantly surprised by the nice lever feel on the Maven Base. The bite point feels nice, crisp and solid.
I'm thinking about trying the Lewis LH4 levers connected to the Maven Base calipers. The LH4 lever has a 9mm master piston diamter, so if the Maven lever is still 9.5mm then it should in theory increase the power but the lever feel will likely change. I'd suspect it wont feel as solid at the bite point but the lever throw should be fairly minimal.
That brings me to the question of oil volume in the master cylinders. The Maven levers 'look' bigger but not sure if they actually hold more volume than the Lewis levers. Has anyone seen any numbers on oil volume of either levers?
This was actually quite amazing in terms of performance.
Anyone that likes and feels the need for the power that the Mavens provide, but doesn't like the heavy lever pull feel of the Maven lever, needs to get on this set up.
The Lewis lever reduced the lever pull feel by over 50% without any noticeable draw backs that I experienced.
I was able to get a super tight free stroke (to the point I ended up reducing my reach by 5mm) and pad/piston retraction was better due to the Lewis LHP lever pushing and pulling more fluid due to the larger piston in the master.
I ended up going back to a full Lewis brake pretty quickly for a few reasons.
1. I had a bit of a problem with the rear maven caliper pistons, needing to "massage" the pistons and getting the lazy ones to free up. This is normal, but the closed in design of the Maven caliper makes it much more difficult to see, adjust, push pistons back and work on in general.
2. Bottom loading pads are pretty much a no deal for me, as I like to clean pistons, adjust and check pad flatness often and having to remove wheels every time is just an inconvenience.
3. I like having the same components/ set ups and feel on all of my bikes, and I'm not keen on buying twice the amount of brakes as I need.
4. The power the LHT brakes provide is still plenty good enough and the weight saving to the unsprung mass is always a bonus.
If you already have Mavens, and don't like the heavy lever pull, reach out to Lewis as they sell levers and parts separately.
Hopefully some produces a brake soon with light lever feel and Maven power (or stronger with good modulation) @lewisbike_official 😳
"pad/piston retraction was better due to the Lewis LHP lever pushing and pulling"
I don't think beekay understands how calipers work.
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?Going by this...
Does any one know what the master cylinder piston size is on Maven levers? It seems like SRAM don't publish that number for some reason?
I've found my self now owning a few different set of brakes now and looking at some frankenbrake set ups. Maven Base came on my new bike and I have two sets of Lewis LH4 on other bikes. I also have a set of the Lewis one to one copies of the Direttissima lever that was only released in China before the adopted the 'Leiws' branding and released the LH4 etc globally
I was pleasantly surprised by the nice lever feel on the Maven Base. The bite point feels nice, crisp and solid.
I'm thinking about trying the Lewis LH4 levers connected to the Maven Base calipers. The LH4 lever has a 9mm master piston diamter, so if the Maven lever is still 9.5mm then it should in theory increase the power but the lever feel will likely change. I'd suspect it wont feel as solid at the bite point but the lever throw should be fairly minimal.
That brings me to the question of oil volume in the master cylinders. The Maven levers 'look' bigger but not sure if they actually hold more volume than the Lewis levers. Has anyone seen any numbers on oil volume of either levers?
This was actually quite amazing in terms of performance.
Anyone that likes and feels the need for the power that the Mavens provide, but doesn't like the heavy lever pull feel of the Maven lever, needs to get on this set up.
The Lewis lever reduced the lever pull feel by over 50% without any noticeable draw backs that I experienced.
I was able to get a super tight free stroke (to the point I ended up reducing my reach by 5mm) and pad/piston retraction was better due to the Lewis LHP lever pushing and pulling more fluid due to the larger piston in the master.
I ended up going back to a full Lewis brake pretty quickly for a few reasons.
1. I had a bit of a problem with the rear maven caliper pistons, needing to "massage" the pistons and getting the lazy ones to free up. This is normal, but the closed in design of the Maven caliper makes it much more difficult to see, adjust, push pistons back and work on in general.
2. Bottom loading pads are pretty much a no deal for me, as I like to clean pistons, adjust and check pad flatness often and having to remove wheels every time is just an inconvenience.
3. I like having the same components/ set ups and feel on all of my bikes, and I'm not keen on buying twice the amount of brakes as I need.
4. The power the LHT brakes provide is still plenty good enough and the weight saving to the unsprung mass is always a bonus.
If you already have Mavens, and don't like the heavy lever pull, reach out to Lewis as they sell levers and parts separately.
Hopefully some produces a brake soon with light lever feel and Maven power (or stronger with good modulation) @lewisbike_official 😳
I’ve been liking the Trickstuff Power pads.
Im not the heaviest rider and our downhills aren’t always steep so its nice that they come up to temp quickly.
Ran into a guy yesterday who claimed he frequently rides with SRAM employees and mentioned that apparently most people like the Maven Bases the most. Or even running a Maven lever with a Level caliper.
Definitely third hand info but I thought it was interesting.
Something I’ve been wondering lately - why do I like the Tech 4 V4s so much better than the Tech 4 E4? I had the E4s on my short travel bike, V4s on the long travel bike for consistency, but recently swapped the short travel bike to DHR Evo Pros (after various issues with the E4s over a few seasons), and expected to want to switch the long travel ASAP. However, I’ve still been totally content with the V4 in the way I never was on the E4. Besides for the obvious increase in power, is there a feel difference between the E4 and V4 caliper that might explain why I like the V4 better?
Not really, e4 tend to have a shorter free stoke and a more defined bite point
Interesting! Somehow I could swear it was the opposite. That said, I’m a bit of a brake dragger so maybe it’s just that the V4s let me sit in the dead stroke a little bit.
https://www.hopetechhb.com/v6ti who is buying some?
Read all about it! https://www.vitalmtb.com/forums/hub/hope-introduces-6-piston-brake-big-bikes-only
$2000 for 6% extra braking power
Much want. I still have a few sets of the Mono 6 ti and regular Mono 6 with various levers on my retro bikes and they still feel and look special.
The new vented rotors look sick. I wonder if they work with the Tech4 V4, (I know they mentioned it was developed specifically for the v6ti), but the tech 4 v4 was the last brake to support the 3.3mm vented rotor spec. Seems the newer GR4 and TR4s dropped that.
If I didn't have my trinity set, I'd buy them with the vented 220mm rotors. Have no real use on my skill level to actually benefit from them, but damn I find it hard to restrain myself.
I've just picked up a new bike that came with Maven silver.. Having been a long time user of Formula Curas and more recently DHR-EVO, I'm really quite impressed with the Mavens. I had to do a bleed on the rear but according to the shop that's standard on new bikes.
Have I got lucky, or are they actually not all bad at all?
how do you feel the power compared to the cura? you had cura 4?
I was also on Cura 4 prior to installing Mavens. I love how I don't have to squeeze the lever super hard anymore.
My Mavens require quite a lot of maintenance, though, so coming from Curas where I rarely if ever had to bleed them, it's a downside.
Cura 2. Much more power but not surprising. I went from Cura 2 (which I didn’t really have any major complaints with in terms of power) to DHRs. Main issue I had with the DHRs is the free stroke which the Mavens don’t have. Power was good though. Mavens seem to be another level though.
What kind of maintenance? Bleeds or sticky pistons? I had Codes before which were fine apart from repeated sticky pistons.
Both. My pair seems to ingest air without leaking the oil, which is baffling. And some pistons are stickier than the others, so have to do the massage as well.
The only thing I can think of is that as the pads wear, the pistons advance, making room for air to "appear" in the lever when you open the lever bleed port for an oil top off.
Is this maybe what is happening, or is it obvious that you have a mushy lever and have air entering the system somehow?
While I'm not entirely sure I get all the air out of the system, it might also be the reason. When the brakes were new, I had to re-bleed them every three to four months - this interval seemed to get smaller and smaller though. It never correlated with the pad wear, and was usually a lever going all the way to the bar. Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation.
Anyway, I've got new calipers and lever rebuild kits so that will hopefully be fixed one way or another.
Are you torquing the Lever/hose nut?
Mavens Require this and its very important or the brakes will never stay good.
I've not needed to bleed mine in 10 months, 3/4 sets of pads on an ebike, just clean pistons and push them back for new pads, set gap with little spacer and go.
"Interestingly, it seemed to happen more often when I drove from the sea level to e.g. Lake Tahoe - so from zero to 6-7k feet of elevation."
I've battled this on a few pairs of maven's and it simply means your bleed procedures are not working with the maven's. I am stopping short of saying that your bleed procedures are bad or incorrect... I had zero issues bleeding all types of mtb brakes for the better part of 22ish years prior to mavens. However, I had the same problem on 2 sets of mavens where they would be fine at sea level (where I live) and then would in-explicably pull to the bars when I would go to mammoth, snow summit or N*. Eventually, I dialed in my bleed procedures and process and those brakes are fine.
There are endless explanations and videos of how to bleed mavens. for me my advice to you would be the following:
-use a bleed cup at the lever and not a dual syringe. I use this metal one i got from ali-express that's pretty rad
-Be very careful to un-stick the plungers/pistons in the syringes prior to filling them. The thicker maxima mineral oil will hold air bubbles in it if you aerate it during the bleed process. Take the bleed syringes apart before filling them, get the o-rings wet with mineral oil and make sure that you do not have work hard to get them moving while filling them. If it this does happen, let the syringe sit for 30-60 minutes, with the hose pointed up right to let all of the air settle
-Ensure you do not pull too much vacuum with the syringes and pull air past the syringe orings during the bleed process
-I use a toe clip to pressurize the system and let it sit for a while (an hour is enough ime) as a part of the bleed process, with the bleeding edge port closed
-use a massage gun to get all of the air out of the lines, calipers and levers as the thicker fluid lets bubbles sit in weird places. I also flick the levers on the MCs to get some bubbles to break free out of the lever assemblies
Admit defeat and be ready to re-start the bleed process if anything seems off. Lastly, extend the reach adjuster all the way out, so you can ensure the pistons are pushing as far out into the bleed block as possible. I love my maven's, but the bleed process took a while to dial in, and yes, they need a bit more looking after then codes, trp's or other previous gen brakesets. #worthit however
Does any one know what the master cylinder piston size is on Maven levers?
It seems like SRAM don't publish that number for some reason?
Going by this - https://docs.google.com/spreadsheets/d/1sjPSmOYbhjDBFxcvXVw1ufKfowEBu1AKh8sB6T8e24Y/edit?gid=0#gid=0
Codes are 9.5mm. Are Mavens the same or smaller or larger?
I've found my self now owning a few different set of brakes now and looking at some frankenbrake set ups.
Maven Base came on my new bike and I have two sets of Lewis LH4 on other bikes. I also have a set of the Lewis one to one copies of the Direttissima lever that was only released in China before the adopted the 'Leiws' branding and released the LH4 etc globally
I was pleasantly surprised by the nice lever feel on the Maven Base. The bite point feels nice, crisp and solid.
I'm thinking about trying the Lewis LH4 levers connected to the Maven Base calipers. The LH4 lever has a 9mm master piston diamter, so if the Maven lever is still 9.5mm then it should in theory increase the power but the lever feel will likely change. I'd suspect it wont feel as solid at the bite point but the lever throw should be fairly minimal.
That brings me to the question of oil volume in the master cylinders. The Maven levers 'look' bigger but not sure if they actually hold more volume than the Lewis levers. Has anyone seen any numbers on oil volume of either levers?
It looks like some EU vendors are starting to carry the Brembo brakes for preorder, claiming ship date is July 6th.
I snuck an order in, hopefully they aren't region locked to prevent sending to the US. Some are claiming the next batch is sold out until the second batch in September, so we'll see if I actually get them or not.
Rotor availability seems weird, also. I was only able to get the brakes, but hopefully I can find some rotors as well.
Also if anyone missed it, there was a spy shot in the rumors thread that appeared to be new Dominions
Just came on here to ask if anyone had seen updates on the Brembos.
What site did you order from? I want to try to snag some asap as well.
I ordered from LordGun, I had good luck with them in the past.
There were a few others that had them, but some (Flow Suspension) didn't seem setup to ship overseas and others claimed they were sold out of allocations until September.
LordGun has been great for me in the past, but they also aren't clear if they are actually showing up in July. The site claims a July 6th ship date, but we'll see if that holds true or not. Point being, order at risk of a several month delay.
Thank you for the insight!
bee_kay77 on instagram has tried this: https://www.instagram.com/reel/C_6sY6kirqA/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==
For those not on Insta..
"pad/piston retraction was better due to the Lewis LHP lever pushing and pulling"
I don't think beekay understands how calipers work.
I feel he lost the plot after the switch to Lewis brakes, talking about unsprung mass in a caliper vs using heavy af wheels
🥲 that’s pointless as
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