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Chainring isn’t rotating, but the slack and whip in the chain between the cassette and idler would rotate the idler forward and create the slack between it and the chainring.
The Vitus prototype is currently on the other side of the Atlantic!
It has happened to me a couple of times on my Forbidden dreadnought, mostly on bike park days with bigger compressions or impact. The chain even got loose enough one time to almost derail from the top guide and made a sweet gouge on my swingarm. It is less bad now that I've switched to a new chain and the stainless idler (compared to the original narrow-wide idler). The chain seems to be really "active" on this part of the bike (in between idler and chainring)
Have never had a problem with it on my GT Force. Ran a mrp g5 SL as a lower for a season and now have the MXG (would highly recommend for any high pivot bike, almost no additional drag compared to not running one and haven’t dropped a chain once). Only time i dropped chains with it was before I had any kind of lower guide and it would pop off under high torque pedaling.
Sspomer - the chain goes slack on those bikes because the idler is not concentric to the main pivot, or the rear end uses a layout that is conducive to chain growth (FSR. etc)
Concentric to the pivot, single pivot design, no chain growth
Most of the idler bikes these days have moved the idler away (below) the main pivot modifying the antisquat to add pedal-ability, but have invited chain growth back to the party
From the other site: Interesting to see the modified idler position with an o-chain. Also nice “pirelli” rubber on there.
They use different chainstays that allow to mount the idler in two different positions. The O-chain makes sense to reduce the feeling of the chain tugging on the pedals (the photos from the US champs clearly shows how much the chain bounces around between the idler and the chainring.
On Pirelli tires: the tires must not suck given riders had good results on them like Revelli's 6th place at MSA last year. However, I don't see how sponsoring a team like Trek can not backfire when their riders will use tires from different manufactures. Regular riders and fans won't even know they are sponsored by Pirelli, and those who actually "care" (like we vitards) will know they use different tires. It's great publicity for Maxxis and Bontrager (I think Bodi Kuhn uses Bontragers) but it's bad for Pirelli. Maybe there is indeed no such thing as bad publicity?
Pirelli doesn’t want to be Kenda with intense. They have plenty of experience developing tires in other sports and have seen plenty of tire brands spend lots of money just to be (often at least somewhat rightfully) blamed for bad results. Their product line might not be there for the very tip top of the sport. But it’s probably good enough for most riders and their splash into wcs is going to help them develop going forward and market their tires today.
That's not their hp6 dh bike. Something new? Second from lowest part looks like the uprights for a vpp rear triangle (or at least a solid rear triangle like vpp and dw use, a linkage driven single pivot can use one too, but vpp seems most probably). The part above it is part of the main frame (has a bb), but beyond that I can't figure out what's going on at all. I'm assuming the parts shown are all for the same prototype...?
So I had to re-mount Kailey's chain on her idler this weekend. She came through and it had popped off the side of the tiny little idler wheel and wouldn't go back on because it was essentially trapped in the little feeder hole inside the swingarm.
Finally got it back on the pulley wheel by using my finger as a "derailleur while her and another person held it up and I turned the cranks. I'm no rocket scientist but my immediate impression was that it was too damn tiny for that much force to go through a pulley wheel mounted so static.
This pic makes me think they're trying to move to something with more surface area capable of handling the heavy loads generated by the cranks.
NS's six-bar Fuzz prototype made another appearance at Hardline last week, this time without an idler: (see this article from a year ago for more details)
Another scary thing I noticed with this is the amount of bikes where the chain has basically lifted cleaned off the idler purely from the wheel travel. I'm shocked they stay on at all after a bottom out!
On sikmik83 's instagram you can see that Yeti already has addressed that chain slap between the little roller and the crank with a plastic cover over the chain.
Mic Williams from WRP / Trinity sat down with Jace on Gypsy tales podcast. Talk a bit about the old Hondas, gear boxes, and current projects.
Frameworks enduro in-depth
Saw a promo for the new 13s XTR today. Must be around the corner…
New boxxer soon.
That’s been going on and on for the past year! 🤪
*cough* tomorrow *cough*
https://traildevils.ch/Talk/RockShox-mit-neuer-BoXXer-697557116c02cb705…
Someone broke the embargo?
is it?
looks similar to the one my capra core 3 already came with
new boxxer deets official - https://www.vitalmtb.com/news/press-release/finally-new-rockshox-boxxer…
Damper: Charger 3 RC2 w/ ButterCups
Spring: BoXXer DebonAir+ w/ ButterCups
Wheel size: 27.5”, 29”
Travel: 180mm†, 190mm†, 200mm
Fork offset: 44mm (27.5”), 48mm (27.5”, 29”) 52mm (29”)
Weight: 2,840g (200mm travel, 48mm offset)
MSRP: $1,899, €2,279*, £2,029*
*Includes VAT, **AM Upgrade available, †Travel change kit available.
Where's the Vivid? I can't be the only one hoping for a big DH product drop, boxxers vivid and the new brake all in one.
Looks like the updated Privateer from a few pages back
New spire? BB area sorta looks like a spire. Any other clues boss man?
Edit: Camber's right. https://www.vitalmtb.com/forums/The-Hub,2/2020-MTB-Tech-rumors-and-inno…
Agreed, this looks like updated Privateer. Especially given the bolt on cable clips on the head tube, the external routing for the rear brake, uber steep seat tube, and chonky main pivot bearings. Looks like a pair of flip chips, one on the seatstay, and one at the rear axle (presumably for CS length). I wonder if the first is for mullet setup, or just slacker. Hard to tell if the rear wheel is 29 or 27.5 from that angle. Must be close to finished because the chainstay protector looks like a finished product (not just mastic tape or VHS like protos get).
That inverted Horst Link at the back screams Rocky Mountain!
Spring 2024 at the earliest.