Block user

Recent

ak-77 mattbeer's article
Dec 1, 2022 at 16:28
20 hours
Review: O-Chain's Active Spider Adds Suppleness & Silence
@justinfoil: I would say the clutch exerts force only when moving AND only in one direction. And I am not sure what is a big deal and what is not. Coil riders say breakaway force of air spring seals is a big deal. So I am trying to find out how that compares to clutch forces before I form an opinion. I thought you might have some data on that.
ak-77 mattbeer's article
Nov 30, 2022 at 14:36
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
@justinfoil: In your experiment, what was the breakaway force (lowest force that produces an actual compression of the damper?) Was it different with the clutch on? How did you record the values you quoted, do you only have static, steady-state values at the end point or were you using some kind of logging system to record a time trace? The point Uuno was trying to make (I assume) is that the friction clutch only exerts force against the direction of movement during this movement. Take a handlebar in one hand and grip it strongly. It now takes force to rotate the bar, but once you stop the rotation there is no force needed to prevent it rotating back. The bar is comparable to the derailleur pivot axle, the gripping hand is the clutch.
ak-77 mattbeer's article
Nov 30, 2022 at 14:04
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
Wouldn't a pair of lightweight cranks with some flex in them do the same thing? With less weight and less maintenance.
ak-77 mattbeer's article
Nov 30, 2022 at 14:00
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
@faul: sure. But I feel that in the PB comment section, the role of psychology in performance is undervalued. I would argue that psychological effects will in most cases trump all these super marginal gain technological add-ons. If you're feeling confident you will rail those corners, time those jumps just right, if your mind is in the right place you will not feel the burn in your muscles as badly. We need good placebo's more than we need better gear.
ak-77 mattbeer's article
Nov 30, 2022 at 5:56
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
@faul: Placebos work. That's pretty soundly scientifically proven. And not just for perception, they actually influence disease outcome. It's still mostly considered unethical in medical science to knowingly prescribe placebos even though they are effective, but in the bike world that's fine.
ak-77 mattbeer's article
Nov 30, 2022 at 5:52
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
@sino428: you'd have to build a freewheel in between the pivot axle and the friction element of the clutch I guess? It would make fro a much more complex system
ak-77 mattbeer's article
Nov 30, 2022 at 5:27
2 days
Review: O-Chain's Active Spider Adds Suppleness & Silence
@justinfoil, the clutch is a friction force, not a spring, I don't think you are comparing it in the correct way. The effect of the clutch should be compared to stiction in the seals of the shock, not to the spring rate of the air chamber. I guess the best comparison between clutch on and off would be on a coil shock with the damper piston removed or disabled? I don't know the actual values of stiction forces in damper seals, but people go on and on about how coils are so much smoother on initial travel so at least to some it is significant.
ak-77 jake28's article
Nov 30, 2022 at 5:14
2 days
We're Back!
Good. Now fix the bug that starts Autoplay even if I disabled that in the settings. And remove autoplay completely from the home page.
ak-77 pinkbikeoriginals's article
Nov 25, 2022 at 10:23
Nov 25, 2022
Video: Friday Fails #249
2:48 is my favorite type of fail. Significant feature, spectacular fail, rider is totally OK.
ak-77 pinkbikeoriginals's article
Nov 25, 2022 at 10:20
Nov 25, 2022
Video: Friday Fails #249
Waddayamean flat, there is a wooden ramp for the landing. :-) Seriously though, street bmx and trial consists for a large part of 6 foot huck to flats on full rigid bikes. Learn to use those pivots called knees. It would be a nice instructional addon to a field test HTF: Obviously, the testers there are making an effort to bottom out the bikes. Would be cool to see one comparison slomo clip with the same bike but with optimal legwork to absorb the impact.
Load more...
You must login to Pinkbike.
Don't have an account? Sign up

Join Pinkbike  Login
Copyright © 2000 - 2022. Pinkbike.com. All rights reserved.
dv65 0.013482
Mobile Version of Website