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That's honestly my favorite solution wherever applicable.
I'm not convinced post mount is a problem that needs addressing - it's been a while since I've seen an issue with one of those. One customer "stripped it", but they had a very short bolt so only stripped the first 3mm of the thread, which was easily worked around with a proper sized bolt. Turner's solution would be awesome though.
Back to rumors - I can't really make out the driveline on the Atherton. I know they've had the video walking around with a pinion, but it's not very clear to me here?
This looks very much chainless to me?
Something everyone has to realize about UBM and UDH is that SRAM is in the business of selling OEM to massive bike companies. Anything SRAM can do to make the process faster and cheaper/better for the OEMs is seen as a win. In the case of Transmission/wireless drivetrains, that is a WIN for OEMs. Say they can shave -5-10 minutes a bike not having to deal with cables, setting stops, tension, etc. They can install a Transmission drivetrain in <5mins, vs. say 10-12min for a cable-actuated version. Now, multiply that times 20,000 MTB builds and you have million(s) of dollars of wages to workers saved. Also, they can make frames cheaper and lighter (dropping things like tube-in-tube, cable ports molded in frames, etc.) *they keep MSRP of frame the same which increases per frame margin (profit).
UBM is likely the same. This will allow frame manufacturers to make frames say $25 cheaper. Now multiply that times 40,000 MTB frames and that's a quick $1 million savings a year. AND the brake posts will be better aligned, and changing rotor sizes will be easier (and faster during OEM builds, as well as they won't need to waste time with washers/longer bolts, etc.).
People think too much from the end consumer or OEM. SRAM is wisely playing to the OEMs with a lot of these moves. AND it also greatly benefits the customer in the long run. UDH is awesome; it's solved the RD hanger problem. AND it allows for direct mount which is a far superior system in terms of robustness and shifting precision.
i thought so too at first. then i did Enhance.gif, and it would appear it is configured with some sort of tensioner pulley that directs the belt upwards towards the main pivot region before back to the rear hub.
Those mis-matched gold-ish colors are something. They go nicely with a bluetooth speaker blaring club music in the forest.
Is that a belt?
It's almost like SRAM is in the business of making money and not to only please us!?! 😄
Any one noticed how the rear shock is mounted on that Atherton bike? the reservoir is now mounted more sideways.
Didn't Dave Weagle post that he had more dual chain bikes (ala Pivot Phoenix) coming up this year?
What if the Atherton bike is a belt driven gearbox bike with the same suspension as the Pivot Phoenix, But instead of 2 chains, it uses 2 belts?
Pretty sure it is. Looks like the belt pokes just above the seatstay as it wraps the pulley too. Very nice.
I didn't get very good feedback on the other site when I voiced my belief we'll see more gearboxes showing up (because I bought one and inspired everyone, of course) haha.
Pretty stoked on seeing some new development in bikes other than a new color and saying that getting rid of a derailleur hanger is a revolution
The Atherton does look to have a high belt line which is interesting. Could be a normal idler bike or 1 belt and 1 chain. I would think that a small belt would be super inefficient, dunno I've not felt the belts they use.
Didn’t see it in this thread, new Brose Motor with 95Nm.
https://www.bike-magazin.de/komponenten/e-bike-motoren/brose-drive-3-pe…
new Levo probably incoming given timing of PB interview + new brose motor announcement
You're right. Didn't see it on my mobile screen.
Now I also see the chainring looking very belty.
Pivot location is gonna be interesting!
Don't they claim belts are more efficient under load? Interestingly on my G3 it feels like the force to bend it around all the cogs and pulleys is noticeable, but when I increase belt tension to recommendation for MTB, it seems to spin much easier.
2 belts would technically have the same number of bends if there's no additional tension pulley, so the energy loss should be similar. I think it's much easier to design with a single belt and a tension pulley though..maybe just because I'm used to looking at it too much!
Possibly naive question; how hard is it to adapt an existing frame design to accommodate a gearbox? Are there other considerations besides creating space and mounting points for it (which requires changing tube lengths etc.)?
Could this be a maxxis radial casing of some sort? Heard a lot about something new from maxxis in the b-practice (mostly Dak being tricked by Jason into talking about it)
There must be more brands than schwalbe working on this technology for sure
I guess Athertons using this also for ebike development more so than DH bike sales
Just a minute… would that mean, if they used your described configuration, AND won an elite WC, that Gates would give them… TWO hundred thousand dollars?!?
But there are a few people who don’t want any batteries on their bike.
If I recall that brief conversation correctly, Dak was suggesting he was able to run lower pressures than normal with the new casing. My understanding of the way the shwalbe radial's work is you end up running higher pressure.
I don't know anything about tires though so maybe they are and its just different.
That damn Schroeder always using his Jedi mind tricks to get Dak to spill the beans!
I know there’s a lot going on today with belt drives and pull shocks but how about silver rims?
I for one, am fully in favor of the increased availability of silver components (and I guess I should take some pics of my bike and post them in Bike Checks)
Hnnnnnngggggggggggg I need those silver rims!
Hopefully it‘s the breakthrough
Since they're asking what you would name a new tire, that might be a new tread pattern.
That said, they soft-released the new DH casing with the new High Roller III, but they didn't really make any news about it.
I'm assuming they're waiting until it's in all the DH-related tires (Assegai, DHR2) first. Which will be this spring.
This new casing has been in the works for a couple of years and is not a 'Radial'. It likely achieves something a little similar in that you have stiffer sidewalls for support, so you can run a bit lower pressures which would make the top of the tire that contacts the group a touch softer. That said, Maxxis (along with all the other brands) are already looking at Radial prototypes/new fiber angles for their future designs.
That barrel nut mount design can still be found today... on Atherton A-series frames.
https://www.vitalmtb.com/community/fuckingsteve/2025-transition-sentinel-custom
Silver rims are in.