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super bummer on super boost
Pinkbike coverage from the China Cycling Show, here you go 32" is old fashion it's time to go 30,5'' from Obor tires in 2,6 & 2,25 options.
RMU claiming 30mm of chain stay growth at sag... interesting...
I assumed that that must have been a typo, but there's a guy who appears to be from the company in the comments on PB who is stating as much. Interesting is right!
It would be really cool to see an axle path graph or, even better, a slow-mo clip of it cycling through its travel.
For Sram Eagle get the Garbaruk cassette which has 52-44-37-32 cogs so has a nice and even gear spacing at the top.
had to google that this was in fact coming from odyssey bmx. and yes, a bmx company has parts being used at the pro tour level. what a time to be alive.
at a quick first glance i read RUM TRAIN.
not a rumor - but i used the term "calibrated eyecrometer" during a work call today.
Calibrated Ocular Comparator is another good one.
ROFL Re: People complaining about Shimano 12sp might need to put the wrench down and step away from the bike. I clean my cassette in the ultrasonic every few weeks. I have 1500miles on my current XT and that lock ring has been loosened and tightened a few 100 times, it's in just as good of shape as it was when new. 1-piece cassettes are nice, but they also are either light and expensive or cheap and stupid heavy... If you struggle to line up some rings and spacers you might not want to work on your or anyone else bike.
So on a park heavy bike, I have actually damaged the MS alloy splines on the lower gears. TQ seemed at spec during disassembly. MS is a decent system but I much prefer XD, like the other commenters.
Squeezed every buzzword into that suspension design
Accurate down to 0.1 bee's dick?/0.25 gnat's ass?
See, I dislike comments like this because instead of commenting on the actual merits of my microspline hatred you claim that it stems from a lack of "ability" and that I am not "worthy" of wrenching because of my opinions.
At no point did I say I struggle with any of it, my argument is an will always be that the XD driver is just a fundamentally better system to deal with. Not only does it provide a better interface for a cassette to sit on, but it makes the livability of a cassette significantly easier. Instead of relying on the pressure placed from a lockring to hold a series of free-floating pieces down, a single piece cassette is structurally self contained and, in my experience, much harder to wear out because of it. X01 cassettes from eagle and transmission just do not die vs an Shimano XTR cassette that will eventually come loose at the rivets.
Also, how many Microspline drivers have wear marks baked into their groves? Every one I've seen has had the plate section of the cassette start cutting into the driver body itself. It's just not as good of a design.
Just spent 10 minutes reading about freehub preferences… Not sure if I can explain to a regular person how much entertainment value this holds for me🍿
Sorry bud, but if you are getting to the point of ranting on the internet about "woefully anemic, made of cheese, lock ring" then yes you might need to evaluate your wrenching skills. lol Sorry you got your feelings hurt. Your rant comes off as just a bunch of lop-sided frustration. You list a bunch of things you hate yet have zero information on what bothers you specifically.
There is no such thing as a perfect design, everything in life is about tradeoffs. Mechanical design is no different, both shimano and sram have teams of ME's sitting and arguing about the merits of one design over another. The HG freehub design has been around since the 80's, it had taken over as the de facto standard for interfacing a cassette to a rear hub, was it without compromise, no, but it served the community very well and was inexpensive to produce, not requiring tight tolerances to work well. When I first got into MTB in the 90's no one complained about having to put a cassette back together and aligning tabs, you just did it. Complaining about doing something that has been around almost 40 years just seems lazy.
You must be forgetting of all the issues with XD when it was released in 2012, many of the XD drivers out there were out of spec leading to fitment issues all across the board. There were countless service bulletins of how to measure the various drivers and ensure compatibility between components. Im scratching my brain to remember the last time that happened with HG or MS???
Remember this:
There were issues with false tightening that would lead to the cassette not bottoming out all the way introducing issues with creaking and making the system shift like crap, cassettes getting stuck on drivers, XD threads cross-threading which roach's not only the driver body but the cassette as well.
Hard to take anything you say seriously, SRAM has had problems with literally everything you complain about with Shimano. I can easily tighten up my shimano clutch when it starts to get loose, cant do that with SRAM. They are super easy to setup and require little adjustment outside of standard cable stretch. Shimano shifters and multi-release is better than single release with the sram shifter.
Keyed and splined drive systems are ubiquitous in large scale industrial power transmission, if you have noise, stop running your sh*t dry.
Can we get some kind of chat/interview with RMU? Curious on many of their decisions with this bike. Superboost, hp flex stay (I assume very close design to the pivot phoenix) among others. Not saying one standard is better than the other; just curious why they did what they did, especially in the current bike market.
I can guarantee they won't be able to show a single graph though (like for axle path) because DW think's he's the Wizard of Oz or something and no one can see behind his magic curtain.
Not exactly the answers you're looking for but from the man himself https://www.instagram.com/reel/DXshLlDEpxu/?igsh=MWNzbzRrMjZpbjBrdA==
So, nomenclature.
In a power transmission system an idler is normally a part that does not transfer power. The “jockey wheels” on the RD are idlers. The tension pulley on a belt drive is an idler. Is this text referring to the three chainrings as idlers?
Pivot also refers to the 2 upper chainrings as idlers...
https://www.pivotcycles.com/en-us/products/phoenix-idler-assembly?Idler…
Thanks! Apparently superboost was to accommodate the chainline of the dual chain solution. My best guess was that RMU wanted to make a bike, probably didn't know how to, so they bought a full suspension solution from DW. I'm not going to pretend I know that much about suspension kinematics and such so I won't comment on the solution itself. Now...of the bike brands that ran superboost : Pivot(doing well, still on 157), Evil(back to 148 boost for most bikes), Knolly (basically chap 11 bankruptcy), Devinci (mostly back to 148 boost except the Chainsaw), WAO doesn't make bikes anymore (the Arrival was 157 sb), Alchemy(looks to be dead). There's bound to be brands I missed here, but judging by how things are going...is it fair to say superboost was not a good move?
For anyone who's curious what Weagle says about the Nighttrain suspension layout but doesn't want to scroll through IG comments, answering someone who asked about the design intent behind the bike:
"Initially trying to gain a bit more mid corner traction on race bikes but as I hated [typo?] on the idea more and more I began to appreciate that it solves a lot of other issues. Definitely not an immediately intuitive benefit for me, it grew on me. In the end it turns out that by the numbers and by seat of the pants human pedaling a bike, this is the most efficient drivetrain layout to get to a mid-pivot layout. Alternatives are more draggy, have more derailleur impact on the suspension and you can notice them riding. This thing is transparent to me. Can't feel it, can't hear it. Just makes traction and goes. I'm pretty stoked on it but I really can't wait to hear other people's take on it after they ride it and form their own opinions."
My two cents is that there is no way on earth this bike has 30mm of chainstay growth at sag. For instance, the Forbidden Supernought (a high pivot DH bike) has 21-23mm chainstay growth at 30-35% sag, and this is a "mid-pivot" 170mm bike.
Supernought graphs linked here.
Boy, the bike industry loves to rename shit in the goofiest way. Those are not idlers.
They are drive sprockets. Two of them mounted on a jackshaft.
Ah ha, also found one for the WRP DH yoke Norco Range, which has a really high pivot - https://www.williamsracingproducts.com/shop/p/norco-range-mullet-yoke-2021
30mm does seem excessive. Pivot Phoenix for comparison...
Funnily enough, Wikipedia (which supports this use of the word) references but contradicts Wiktionary and its sources.
If you think of an idler as being an intermediate part of a powertrain, i.e. not being directly on a power input or output shaft, and then squint hard enough, you might be able to rationalise it...
FWIW I always assumed the meaning is as you state and will probably continue to do so.
The comparable bike that is approaching 30mm of rearward travel at sag is the Craftworks ENR with 27mm or so. That thing is on the extreme end of high pivot. The RMU is not. 13mm is a more likely number...
V1 dreadnought is about as high as they get and even that was 29mm at full travel
Simplicity through complexity. 🤯
XD and MS are irrelevant ever since the XS-1270 cassette achieved a 10 tooth cog on an HG driver. Seriously why do any other freehub bodies exist anymore.
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