I think 7005 is a less expensive weldable alloy, as it doesn't need to be heat treated post-weld. 6061 is a better option but needs heat...
I think 7005 is a less expensive weldable alloy, as it doesn't need to be heat treated post-weld. 6061 is a better option but needs heat treatment.
7075 is more than just a little stronger than most Al alloys, typically 525 MPa vs 290 for 6061. So less stress per unit force applied and better fatigue life, especially without the complication and inconsistency of welding.
Like most here I've had a several Al frame failures, always from fatigue at a weld. Bonding is better and more consistent once you have a design and process that works, but that isn't trivial.
For the same design and same loading, stress is the same for the two materials assuming no deflection. Modulus of elasticity is the same for all intents and purposes so when you consider deflection as well it’s still pretty much the same. S-N curve is the quick and easy way to visualize fatigue. For the same stress, 7075 can handle significantly more cycles. This graph is something I found really quick so no idea how accurate it is, but conveys the point. Traced lines for stress that would cause failure in 10^4 cycles in 6061. Would require about 10^5.6 cycles for 7075 to fail under the same stress. So same part same application but 7075 instead of 6061 would last almost 40x as many cycles.
In my mind, usage of 7075 is about what it lets you do with the design. For some things the reality is it doesn’t let you do much other than take a part that’s already overbuilt and make it way overbuilt. On the other hand there are parts such as our DHX2 MX eyelet that wouldn’t be possible in 6061.
If you're stiffness limited 7075 is mostly a marketing point. Making a C section crankarm (more or less most modern cranks that are forged and/or machined) out of 7075 and thining it out to achieve the possible limits will probably just make it more noodly. Making a handlebar out of 7075 vs. 6000 series and modifying it to achieve the same fatigue limit will make it more flexy as well but this might be a lot more beneficial than crank arms.
The man on the left has his top of the fork showing. Says Kashima on it.
I meant that in races, riders like Remi and Richie have been running non-Kashima current-model forks. I think the reason these forks are blurred out is because they're the new chassis.
It's definitely funky. Adjustable for wheel size, lower pivot is concentric with the bottom bracket and drives the shock. Also includes in-frame storage and has some nice details like good access to the high speed rebound on Fox shocks from the non-drive side.
I meant that in races, riders like Remi and Richie have been running non-Kashima current-model forks. I think the reason these forks are blurred out is...
I meant that in races, riders like Remi and Richie have been running non-Kashima current-model forks. I think the reason these forks are blurred out is because they're the new chassis.
Seems that top tier guys run non-kash for the off season. Same deal when the 38 dropped
My favorite brake of all time is when I've ridden other guys Hope brakes.
But I have Codes & Guides on current bikes just due to...
My favorite brake of all time is when I've ridden other guys Hope brakes.
But I have Codes & Guides on current bikes just due to "winding up with", not seeeking out.
I'm like Krispy & run my reach adjust fairly close to the bar. Don't like reaching way out to pull a lever in just for "feel or modulation".
Modulation should happen from a half pull and to the bar itself.
The one thing I can't stand about my Codes and/or Guides is that if you're on a ripper running day of laps, at some point either you gotta back the lever out to a reach point that's inconvenient to make up for pad wear & get more throw in to get your power/bite point back.
OR...you get the reach right, the power almost perfect BUT...then you feel the perch and lever flex toward and sometimes touch the grip when you've got a heavy yank.
Maven's sound like a damn nightmare to me. I want to buy/try them. But damn...I do NOT want to pull wheels, try rotors, try the next rotor, then maybe the next one, then go back through trying a different pad with each style rotor and....good lord!
i swiched to mavens coming from code RCSs, still riding 200mm front and rear, only thing i changed was now running organic pads in both ends...
i swiched to mavens coming from code RCSs, still riding 200mm front and rear, only thing i changed was now running organic pads in both ends. tried sintered in the rear same as with codes but wheel locked up too quick for my taste. now with organics on both ends brake is real dream, same feel/modulation as codes but with way more power. lever pull isn‘t any firmer than on the codes. can only recommend tryin mavens. hope that helped
edit: also i‘m on the lighter side with around 165lbs.
Same on all fronts, 200 front and rear on organic pads, but I came from the SRAM Code Ultimate Stealths and Code RSCs before that. Just got back from a trip to Santa Cruz area and finally got to ride mine up there, maybe I got lucky but the lever pull feels exactly the same as my Stealth's did, but the brakes are way more powerful so you can brake later with one good stab of the levers then let off and keep rolling. BIG fan so far...
For the same design and same loading, stress is the same for the two materials assuming no deflection. Modulus of elasticity is the same for all intents and purposes so when you consider deflection as well it’s still pretty much the same. S-N curve is the quick and easy way to visualize fatigue. For the same stress, 7075 can handle significantly more cycles. This graph is something I found really quick so no idea how accurate it is, but conveys the point. Traced lines for stress that would cause failure in 10^4 cycles in 6061. Would require about 10^5.6 cycles for 7075 to fail under the same stress. So same part same application but 7075 instead of 6061 would last almost 40x as many cycles.
In my mind, usage of 7075 is about what it lets you do with the design. For some things the reality is it doesn’t let you do much other than take a part that’s already overbuilt and make it way overbuilt. On the other hand there are parts such as our DHX2 MX eyelet that wouldn’t be possible in 6061.
If you're stiffness limited 7075 is mostly a marketing point. Making a C section crankarm (more or less most modern cranks that are forged and/or machined) out of 7075 and thining it out to achieve the possible limits will probably just make it more noodly. Making a handlebar out of 7075 vs. 6000 series and modifying it to achieve the same fatigue limit will make it more flexy as well but this might be a lot more beneficial than crank arms.
So is the new Fox fork chassis incoming imminently? This is a GMBN journalist.
There's a new Fox fork chassis? I thought it was all internal changes for the 38. Unless this is for a 36?
Seems like MY24 is internal changes only (at least from what can be seen in the parts specs on the Fox site).
MY25 may be more extensive.
If they're testing with journalists, must mean the announcement and reviews are imminent?
I haven’t been keeping tabs lately but I’d only heard it was internal updates. I’m asking if/how we know there’s a new chassis
It's their 50th anniversary... Good excuse to do something...
Race Face with 3 upcoming releases...
https://www.raceface.com/pages/the-new-carbon-era
Likely ERA wheels/rims, handlebars and maybe something unexpected.
Some of the factory riders are riding non-Kashima forks which as it was pointed out earlier happened last right before the 38 was released.
In the IG post, the entire fork is blurred out on each bike.
Wow there’s a ride-4 chip!
Dang that’s a sweet looking Nomad
The man on the left has his top of the fork showing. Says Kashima on it.
I meant that in races, riders like Remi and Richie have been running non-Kashima current-model forks. I think the reason these forks are blurred out is because they're the new chassis.
Looks like Kashima lowers too
Excited for what comes of it. Love my Era cranks, and I've been looking for a reason to replace my Spank stem.
Why the switch to VPP? Thats a big move from Horst (which I prefer)
This looks incredible. Bravo rocky.
Wonder if its just a normal vpp or they're are a bunch of funky flip chips etc.
Nice EndurMegaMaditude!
It looks like it's using their Ride4 chip at the forward shock mount, and is also using reach adjust headset cup/chips.
It's definitely funky. Adjustable for wheel size, lower pivot is concentric with the bottom bracket and drives the shock. Also includes in-frame storage and has some nice details like good access to the high speed rebound on Fox shocks from the non-drive side.
Chassis are censored because, colors.
Gold lowers for the 50th anniversary makes sense.
I thought Fox forks couldn't get any uglier.
VPP patent is now expired so no more licensing fees open up option for brands. Might see the same when the DW4 patent expire.
Same thing that happened when Horst link patent expired around 2016? and DT/Hugi star ratchet for freehubs 2 years ago ?
Seems that top tier guys run non-kash for the off season. Same deal when the 38 dropped
I ride 4 chips.
Same on all fronts, 200 front and rear on organic pads, but I came from the SRAM Code Ultimate Stealths and Code RSCs before that. Just got back from a trip to Santa Cruz area and finally got to ride mine up there, maybe I got lucky but the lever pull feels exactly the same as my Stealth's did, but the brakes are way more powerful so you can brake later with one good stab of the levers then let off and keep rolling. BIG fan so far...
that link is smoll