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LavenderGooms vernonfelton's article
Jan 18, 2018 at 6:42
Jan 18, 2018
What's the Deal With SRAM's DUB System? More Questions
@KennyWatson: Yep! I asked a good machinist friend of mine his opinion and he agreed with you that 28.99mm is likely the nominal size of the shaft, and that holding a small "half a thou" tolerance would be expected for a part like this. Apparently on large production runs for parts like these they use a centerless grinding technique which makes hitting small tolerances like that relatively cheap for a large number of parts. I still think its silly for SRAM to say 28.99mm, but we can always call it 29mm for convenience sake, I know I will. I'd also like to take a micrometer to a new GXP spindle and see that it measures out too, for curiosity's sake, as well as a DUB bb whenever our shop gets them in.
LavenderGooms vernonfelton's article
Jan 17, 2018 at 17:02
Jan 17, 2018
What's the Deal With SRAM's DUB System? More Questions
@KennyWatson: Interesting, you're right on that. So a 28.99mm shaft WOULD fit cleanly into a 29mm bearing. That chart would also indicated that they do indeed hold such tolerances. The thing is though, that means that if Shimano BB bearings are 24mm ID then the shaft would be 23.99mm OD. Or old GXP was a 23.99mm shaft. So while SRAM is correct with their number, calling it 28.99mm and not just 29 still kinda screams marketing wank to me.
LavenderGooms vernonfelton's article
Jan 17, 2018 at 15:22
Jan 17, 2018
What's the Deal With SRAM's DUB System? More Questions
Yeah its such bullshit. They're saying theyre holding a 10 micron tolerance which is just false. A red blood cell is about 10 microns, a human hair is up to 100 microns thick, which would be 10 times bigger than their tolerance? Bull. Are they accounting for the 2-5 micron thick anodizing coating? For a part this well manufactured, how are they transporting it? are you supposed to use gloves when installing? If 10microns was so important you think they would say something, but nah they'll just ship it in a cardboard box. Even IF they are doing that ridiculous tolerance, why?!? Bearing interfaces do NOT need that kind of precision. Furthermore, the performance difference between 29mm and 28.99mm is actually nothing, so why bother jerking us around with this 28.99mm BS. Its just marketing, shitty, shitty marketing.
LavenderGooms vernonfelton's article
Jan 17, 2018 at 15:16
Jan 17, 2018
What's the Deal With SRAM's DUB System? More Questions
Plus even if they are manufacturing to a 10 micron tolerance, why?! Bearing interfaces do not need to be that tight by any means, and I can guarantee there is 0 performance difference between a 28.99mm spindle and a 29. New standard? Fine. This 28.99mm shit is just marketing wank though, and makes everything else they say suspect.
LavenderGooms vernonfelton's article
Jan 17, 2018 at 15:14
Jan 17, 2018
What's the Deal With SRAM's DUB System? More Questions
Yeah I was thinking the same thing, a spindle machined to 0.01mm tolerance would be absurdly expensive. The price doesnt reflect that at all. I call BS.
LavenderGooms pinkbikeaudience's article
Dec 15, 2017 at 12:08
Dec 15, 2017
2017 Pinkbike Awards: Athlete of the Year
He really is something else isnt he. Incredible athlete
LavenderGooms ClayPorter's article
Dec 12, 2017 at 16:27
Dec 12, 2017
LavenderGooms vernonfelton's article
Dec 7, 2017 at 21:58
Dec 7, 2017
IMBA Opposes Bill to Allow Mountain Bikes in Wilderness
To quote the great Team Robot "IMBA: More access is probably better hopefully, but less would be okay too, as long as it isn't too much less, please." What spineless losers.
LavenderGooms pinkbikeaudience's article
Dec 4, 2017 at 12:02
Dec 4, 2017
2017 Pinkbike Awards - Component of the Year Nominees
For all the hype I've seen on this e13 cassette ive literally never seen one on a bike in the wild. Same with the TRP brakes. Meanwhile, everyone in 2017 is running the new Geagle. Easy choice.
LavenderGooms pinkbikeaudience's article
Aug 17, 2017 at 21:36
Aug 17, 2017
Replay: Ultimate Pumptrack Challenge - Crankworx Whistler 2017
Neethling is kinda a natural at this announcing thing
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