Shimano/TRP Maven - S-tier braking (Shaven/Traven)

Primoz
Posts
4599
Joined
8/1/2009
Location
SI
3/4/2026 9:24pm

You have some very svelte, thin yet strong as hell fingers if you can push back the pistons with your finger. 

I've always used a tire lever. With codes, doing it from above, there is a risk of breaking the pad pin hole... 

1
3/5/2026 3:01am
Primoz wrote:
You have some very svelte, thin yet strong as hell fingers if you can push back the pistons with your finger. I've always used a tire lever...

You have some very svelte, thin yet strong as hell fingers if you can push back the pistons with your finger. 

I've always used a tire lever. With codes, doing it from above, there is a risk of breaking the pad pin hole... 

to be fair, for the past 8-9 years I have only had magura MT5/MT4 calipers, which I can push with fingers,, ocasionally a tire lever.. these are not finicky as other brands, dont get pushed sideways nor super hard to push.

ozzer
Posts
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4/21/2010
Location
Temecula, CA US
3/5/2026 7:37am
AndehM wrote:
Huh, weird.  When I've seen those before they referenced DB so I figured it was just for the DB8 brakes.  Does that spacer fit in the...

Huh, weird.  When I've seen those before they referenced DB so I figured it was just for the DB8 brakes.  Does that spacer fit in the notch in the caliper body for the rotor to keep it centered?  Now I'm curious to see what the thickness is of the pad spacer (thin side) + brand new pads, or pad spacer + worn old set of pads that I use for bleeding.  I like using the pad spacer because when you use the thick side to reset the pistons (with pads in), it pushes all 4 pistons back evenly, unlike trying to get them one at a time with a plastic tire lever.  Even the red plastic sliding wedge tool tends to do 1 side before the other.

musta wrote:
I just found a 3D print file. Came in 3.8 and 4mm. Pad spacer even on the thick side is smaller width than the sram massage...

I just found a 3D print file. Came in 3.8 and 4mm. Pad spacer even on the thick side is smaller width than the sram massage spacer.

Yes clips to brake pad retaining bolt.


If you want a better option to evenly push pistons back in then have a look on AliExpress etc. look up ‘piston spreader tool bicycle’

Better than a tyre lever and no risk of popping a piston out.


Anyway let’s get back to talking Shimano levers and not make this another maven bleeding thread. 

TEAMROBOT wrote:
If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers...

If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers. If the pad spacer was 4.0mm (the same width as two HS2 rotors, which was SRAM's previous recommendation for a Maven piston massage), it wouldn't fit in the notch in the caliper body on the DB8. And yes, the spacer should nest in the notch in the caliper body on either the Maven or the DB8, which helps keep it centered and helps prevent you from over-extending a piston.

Before the SRAM spacer came out, I was using an old 4mm thick Pedro's wrench for Shimano Hollowtech 2 BB cups for piston massages on my Mavens. Worked great, but I prefer the new spacer because clips into the brake pad pin and I don't have to hold it there.

Klucz do suportu Pedros BB Wrench II Shimano - Rowertour.com

 

Serious question: how is everyone putting the pistons back in place after extending them during a piston massage?

I'm using an old yellow plastic tire lever and doing the pistons one at a time (more or less), but that feels barbaric and incredibly imprecise, and seems like a great way to sideload or accidentally angle a piston into the caliper seal. Is anyone messing around with a piston reset tool like one of these (I'm going to post this in the Brake Nerd thread, too, because I'm curious). And yes, I recognize that two out of these three tools would not work in a Maven because there's no access to the top of the caliper:

Since with all these Maven (I have 4 of them on my bikes) piston massage and since none of my old traditional piston press tools fit the Maven caliper, I have started using this type of piston press with ease. $45 is steep but it's made of alloy rather than 3D printed plastic like the cheaper ones. 

55130776095 06e0093129 4k.jpg?VersionId=o
2
3/5/2026 8:27am

How often are we supposed to be taking our pistons to the spa for a massage? I thought this was one time out of the box?

1
StudBeefpile
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246
Joined
6/27/2018
Location
Almost Canada™, WA US
3/5/2026 8:49am Edited Date/Time 3/5/2026 8:58am

Just chop an old rotor in half.  Bet you have one laying around in your shed somewhere.  Also it doubles as a ninja star if someone tries to break in. 

I have always done a "piston massage" as part of my brake bleed routine.  Push pistons out, clean with a q-tip and brake oil, repeat 4x or until all pistons move freely.  I find this really helps prevent pistons from getting stuck or pushing out unevenly.  When SRAM came out and gave it a fancy name in made me chuckle, I just thought that was part of maintaining your brakes. That said, if you are doing a bleed, you should do this.  Its wild how much crud you will pull off your pistons.  

Sorry for the stupid large images, I don't know how to make them smaller. 

And to answer your question @TEAMROBOT you can see my tried and true pad-pusher-back-inner pedros tire lever.  That said, I have fucked up and blasted a piston out when pushing a different one in.  I should probably get something better but there is some thrill in living on the edge. 

IMG 3505

IMG 3506.JPG?VersionId=dBolS.0gLUB5tiL3

 

2
3/5/2026 10:47am
Just chop an old rotor in half.  Bet you have one laying around in your shed somewhere.  Also it doubles as a ninja star if someone...

Just chop an old rotor in half.  Bet you have one laying around in your shed somewhere.  Also it doubles as a ninja star if someone tries to break in. 

I have always done a "piston massage" as part of my brake bleed routine.  Push pistons out, clean with a q-tip and brake oil, repeat 4x or until all pistons move freely.  I find this really helps prevent pistons from getting stuck or pushing out unevenly.  When SRAM came out and gave it a fancy name in made me chuckle, I just thought that was part of maintaining your brakes. That said, if you are doing a bleed, you should do this.  Its wild how much crud you will pull off your pistons.  

Sorry for the stupid large images, I don't know how to make them smaller. 

And to answer your question @TEAMROBOT you can see my tried and true pad-pusher-back-inner pedros tire lever.  That said, I have fucked up and blasted a piston out when pushing a different one in.  I should probably get something better but there is some thrill in living on the edge. 

IMG 3505

IMG 3506.JPG?VersionId=dBolS.0gLUB5tiL3

 

My hands started bleeding just looking at these pictures

7
StudBeefpile
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246
Joined
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Location
Almost Canada™, WA US
3/5/2026 11:25am
segamethod wrote:

My hands started bleeding just looking at these pictures

Not for the faint of heart! 

1
AndehM
Posts
677
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5/7/2018
Location
El Granada, CA US
Fantasy
3/5/2026 11:57am
musta wrote:
I just found a 3D print file. Came in 3.8 and 4mm. Pad spacer even on the thick side is smaller width than the sram massage...

I just found a 3D print file. Came in 3.8 and 4mm. Pad spacer even on the thick side is smaller width than the sram massage spacer.

Yes clips to brake pad retaining bolt.


If you want a better option to evenly push pistons back in then have a look on AliExpress etc. look up ‘piston spreader tool bicycle’

Better than a tyre lever and no risk of popping a piston out.


Anyway let’s get back to talking Shimano levers and not make this another maven bleeding thread. 

TEAMROBOT wrote:
If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers...

If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers. If the pad spacer was 4.0mm (the same width as two HS2 rotors, which was SRAM's previous recommendation for a Maven piston massage), it wouldn't fit in the notch in the caliper body on the DB8. And yes, the spacer should nest in the notch in the caliper body on either the Maven or the DB8, which helps keep it centered and helps prevent you from over-extending a piston.

Before the SRAM spacer came out, I was using an old 4mm thick Pedro's wrench for Shimano Hollowtech 2 BB cups for piston massages on my Mavens. Worked great, but I prefer the new spacer because clips into the brake pad pin and I don't have to hold it there.

Klucz do suportu Pedros BB Wrench II Shimano - Rowertour.com

 

Serious question: how is everyone putting the pistons back in place after extending them during a piston massage?

I'm using an old yellow plastic tire lever and doing the pistons one at a time (more or less), but that feels barbaric and incredibly imprecise, and seems like a great way to sideload or accidentally angle a piston into the caliper seal. Is anyone messing around with a piston reset tool like one of these (I'm going to post this in the Brake Nerd thread, too, because I'm curious). And yes, I recognize that two out of these three tools would not work in a Maven because there's no access to the top of the caliper:

ozzer wrote:
Since with all these Maven (I have 4 of them on my bikes) piston massage and since none of my old traditional piston press tools fit...

Since with all these Maven (I have 4 of them on my bikes) piston massage and since none of my old traditional piston press tools fit the Maven caliper, I have started using this type of piston press with ease. $45 is steep but it's made of alloy rather than 3D printed plastic like the cheaper ones. 

55130776095 06e0093129 4k.jpg?VersionId=o

Where'd you get that one?  The long red metal SRAM (or China copies) doesn't work as it's for top loading, and the "Laser" style one in Charlie's post doesn't either (doesn't fit right and just bends).

1
3/5/2026 12:03pm

How often are we supposed to be taking our pistons to the spa for a massage? I thought this was one time out of the box?

I think it's intended to happen with every bleed.

I'm in the market for new brakes and have been looking at a bunch of different brake options. It looks like a 5-ish minute process per brake but I haven't done it to be able to tell you "this is how long it takes" definitively.

1
ozzer
Posts
46
Joined
4/21/2010
Location
Temecula, CA US
3/5/2026 9:32pm

How often are we supposed to be taking our pistons to the spa for a massage? I thought this was one time out of the box?

I think it's intended to happen with every bleed.I'm in the market for new brakes and have been looking at a bunch of different brake options...

I think it's intended to happen with every bleed.

I'm in the market for new brakes and have been looking at a bunch of different brake options. It looks like a 5-ish minute process per brake but I haven't done it to be able to tell you "this is how long it takes" definitively.

From my own experience, and I have 4 sets of Maven (straight up stock), after the initial massage from brand new, I've skipped the massage during subsequent reset mainly during pad replacements. Haven't had the need to rebleed any of my sets. 

1
ozzer
Posts
46
Joined
4/21/2010
Location
Temecula, CA US
3/5/2026 9:34pm
TEAMROBOT wrote:
If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers...

If anyone's wondering, the new SRAM piston massage spacer is 3.8mm instead of 4.0mm because at 3.8mm it can work on DB8 and the Maven calipers. If the pad spacer was 4.0mm (the same width as two HS2 rotors, which was SRAM's previous recommendation for a Maven piston massage), it wouldn't fit in the notch in the caliper body on the DB8. And yes, the spacer should nest in the notch in the caliper body on either the Maven or the DB8, which helps keep it centered and helps prevent you from over-extending a piston.

Before the SRAM spacer came out, I was using an old 4mm thick Pedro's wrench for Shimano Hollowtech 2 BB cups for piston massages on my Mavens. Worked great, but I prefer the new spacer because clips into the brake pad pin and I don't have to hold it there.

Klucz do suportu Pedros BB Wrench II Shimano - Rowertour.com

 

Serious question: how is everyone putting the pistons back in place after extending them during a piston massage?

I'm using an old yellow plastic tire lever and doing the pistons one at a time (more or less), but that feels barbaric and incredibly imprecise, and seems like a great way to sideload or accidentally angle a piston into the caliper seal. Is anyone messing around with a piston reset tool like one of these (I'm going to post this in the Brake Nerd thread, too, because I'm curious). And yes, I recognize that two out of these three tools would not work in a Maven because there's no access to the top of the caliper:

ozzer wrote:
Since with all these Maven (I have 4 of them on my bikes) piston massage and since none of my old traditional piston press tools fit...

Since with all these Maven (I have 4 of them on my bikes) piston massage and since none of my old traditional piston press tools fit the Maven caliper, I have started using this type of piston press with ease. $45 is steep but it's made of alloy rather than 3D printed plastic like the cheaper ones. 

55130776095 06e0093129 4k.jpg?VersionId=o
AndehM wrote:
Where'd you get that one?  The long red metal SRAM (or China copies) doesn't work as it's for top loading, and the "Laser" style one in...

Where'd you get that one?  The long red metal SRAM (or China copies) doesn't work as it's for top loading, and the "Laser" style one in Charlie's post doesn't either (doesn't fit right and just bends).

https://atlus.bike/?country=US (from this shop). I would advise against the cheaper amazon knockoff as they're made of 3D printed plastic materials. 

1
3/9/2026 11:24pm

Am I the only one who just uses both sides of the pad spacer the brakes ship with for the piston massage?

3
StudBeefpile
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246
Joined
6/27/2018
Location
Almost Canada™, WA US
3/20/2026 8:10pm

Am I the only one who just uses both sides of the pad spacer the brakes ship with for the piston massage?

That is the intended use for those things.  I just had all ready made a ninja star.  

2
Evwan
Posts
124
Joined
11/18/2025
Location
Sunnyvale, CA US
Fantasy
3/26/2026 2:58pm

TRP DHR evo lever / Maven Base update. I set these up with maxima mineral oil and Shimano BH90 hose, and just a simple Shimano style bleed cup bleed after pushing oil through the lines. I also did a comprehensive piston massage procedure. 

I did one shuttle day on the setup, and impressions are that this combination is quite good. The lever stroke is very acceptable, bite point feels well defined and does not wander or pump out at all, and the maven power is also there. Good modulation, as you would expect from TRP lever. I've got the stock organic pads in there now, but I'll probably switch to metallic once those wear out. 

My plan is to run this all summer in Whistler

IMG 1373
9
4/13/2026 7:10am

Update on Maven Silver/Ultimate with the Shimano BH90 banjo/stock XT setup. No leaks whatsoever at the banjos. About ten 1,500ft steep brake heavy descents on them with plenty normal trail and bike park style riding mixed in. (ebike) I’m putting this setup on my trail and park bike here soon so will have every riding situation to report back on this summer.


On another note I’m finding I like an organic pad in the rear and a sintered in the front. The sintered in the rear is so powerful it feels like it’s meant for a DH race bike where you have very defined precise braking points. The organic rear is much easier to scrub speed off without breaking traction. (220 rotor rear)

2
bnsleit
Posts
121
Joined
9/27/2021
Location
Missoula, MT US
5/18/2026 10:06am Edited Date/Time 5/18/2026 10:06am

Any reason to think a Shimano SLX lever with Maven Ultimate calipers (with the freestroke screw installed *on the levers) wouldn't function as well as an XT lever? Got a new bike and can't get these Codes off quickly enough

Evwan
Posts
124
Joined
11/18/2025
Location
Sunnyvale, CA US
Fantasy
5/18/2026 12:16pm
bnsleit wrote:
Any reason to think a Shimano SLX lever with Maven Ultimate calipers (with the freestroke screw installed *on the levers) wouldn't function as well as an...

Any reason to think a Shimano SLX lever with Maven Ultimate calipers (with the freestroke screw installed *on the levers) wouldn't function as well as an XT lever? Got a new bike and can't get these Codes off quickly enough

As long as it is the servowave slx lever, and not the linear one intended for XC 2 piston brakes, I don't see any reason to not use it with the maven caliper. 

1
5/18/2026 7:17pm
bnsleit wrote:
Any reason to think a Shimano SLX lever with Maven Ultimate calipers (with the freestroke screw installed *on the levers) wouldn't function as well as an...

Any reason to think a Shimano SLX lever with Maven Ultimate calipers (with the freestroke screw installed *on the levers) wouldn't function as well as an XT lever? Got a new bike and can't get these Codes off quickly enough

I can tell you with certainty that slx servo wave levers with a free stroke screw installed are the exact same as xt minus the color and textured lever blades.

1
5/19/2026 4:04pm

I would be curious to see how Shimano BL-M4100 levers fare in a Shaven setup.  

After spending too much time reading about Shigura setups this fall, I stumbled upon a German thread in which people were advocating for the cheaper, non-servowave levers for a more linear feel with good power.  The more expensive non-servowave, XTR Race levers lack the power to really drive the calipers in a heavier-duty setup, but that's not an issue with these due to long levers producing high leverage.

I now have a few days on a new Shigura setup (BL-M4100 + MT5 + Redline Likewater fluid), and it feels awesome.  It has a super light pull with very little dead band, a clearly defined pressure point, easy modulation, and ample power.  They could potentially be sweet in a Shaven application if you're looking for a non-binary lever feel, and they can be obtained for a song online.    

1
Brolfrides
Posts
1
Joined
5/22/2026
Location
Salt Lake City, UT US
5/22/2026 10:22am

Question for those who have run Travens:

With maven silver calipers, can you run the TRP hoses and banjos and just connect them directly into the maven calipers? I have full TRP set up right now but interested in trying Travens

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