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gnaralized mikelevy's article
Oct 2, 2020 at 15:04
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@monkeybizz: Not as much as new bike standards, obviously :))
gnaralized mikelevy's article
Oct 2, 2020 at 14:55
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@monkeybizz: I know, I know, I'm a troll hunter myself... Great for vorticity reduction ! Thumbs up laminar flow !
gnaralized mikelevy's article
Oct 2, 2020 at 14:51
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: "I never said anything about forks but I know for a fact that a narrow bike is faster" Bike with fox 40 are wider than bike with boxxers but they win races at least as much. So cross section differences between boxxers and fox40 makes no winning difference despite being one order of magnitude greater than crosse section increase generated by 157+ vs whatever you like. So no, a narrow bike is not always faster. We are living in a non-linear, counter-intuitive world, sorry. So I don't know if you are really able to catch it, but this show that what you believe about aerodynamic is defintelively not applicable to MTB... i.e. your common sense is useless for complex drag calculations. And 157+ don't change anything on race results. "You gave up on your weak q factor argument pretty quickly." I get it ! You're upset with numbers. Come on, make my day, I gave you the figures, explain me what I gave up with clear and intelligible terms for once. "You don't acknowledge it makes expensive 148 hubs useless. " Oh yeah ! This one ! I acknowledge this one ! 148 will die, slowly phagocytized by 157+ in the same way 142 has phagocytized 132 and 148 for 142 ! I get it ! You don't believe in evolution theory ! Seriously, I believe this is your main issue with 157+... You're butthurt. "You don't acknowledge that existing frames and wheels are already stiff enough." Stiff enough for what ? On which scale ? Any figures about stiffness ? No. Just "common sense". As for all your argumentation. "You don't acknowledge that customers never asked for this" Monkeys never asked for bananas, nor bananas for monkey before they meet... Deserts never asked for rain. Romeo never asked for Juliet. Beavis for Butthead. But good, independant engineers did for 157+. "You don't acknowledge that bike companies did this for their own reasons and not customers." Devinci, Pivot, Mondraker, Knolly. All engineering and rider oriented companies, with lifetime waranties on their frame and 0.5% market share togethers and against all every others... Not your typical trekalized evil... "All these things are obvious" Sure they are for you, but you're alone.... "I feel like Biden in the debate with Trump." Sorry, I feel like Bidden. You argue like Trump : “More aerodynamic. Narrow is faster. Not alot but enough to make a difference if you lose a DH race by. 05 seconds.” Just common preconception and anger. "Do you ride a SB+ bike?" Sorry to deceive, I'm still on my good old 12x142 27.5 warden C because it is well enough, but from an engineering standpoint, despite all your belief, 157+ make a lot of sense.
gnaralized mikelevy's article
Oct 2, 2020 at 13:57
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: "That's not very impressive considering most people wouldn't be likely to run those cranks on an aggressive bike with 157 spacing." Yes it's absolutely impressive since you can have the qfactor of an XC bike on a 157mm width real axl... That's progressive engineering, what is so hard to understand ? Even the guy from MTBR state that it will not change anything for trail bike riders (your own citation): "However, this is only really a change for XC riders, as enduro riders usually run wider pedals mounted to 177 mm Q factor cranks anyway." So no, sorry, there is absolutely no evidence that "157+ is a horrific development for pedaling efficiency in many respects" . It's just in your mind. And you can repeat it as much as you like, it will not become a truth. You can summon Eddy F. Merckx or Bernard F. Hinault or even His Greatness Louison F. Bobet, 157+ has still the same qfactor as a 142/148 trailbike or even a XC bike if you want to put a lightweight crank on your bike. I gave you the figures. That's a fact.
gnaralized mikelevy's article
Oct 2, 2020 at 13:41
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: "But it is an absolute fact that a narrow bike is faster than a wider bike if everything else is equal" Yeah, absolute fact indeed... So following your reasoning, a fox 40, which got 40mm stanchions and a 716.5 mm height (from axle to top crown) got a 71.65 cm2 increase (figure a 8.46 x 8.46 cm surface) of its cross-section versus a RS boxxer with 35 mm stanchions (a full 10 mm width difference)... Any evidence guys with fox 40 are slower than guys with boxxers ? And you really believe than a 4.5 mm increase of rear axle width will change something - aerodynamically ? If you're in for aerodynamics 101 please go back to physics school and learn f.....g fluid dynamics and drag calculations... But please be kind and keep your absolute facts for fox news.
gnaralized mikelevy's article
Oct 2, 2020 at 13:09
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: Universal Shimano qfactor is 176mm: "The XT FC-M8000-1 (1x11s) is optimized for 1-way drive crankset, which is characterized II crank arm construction with a universal Q factor of 176 mm, a stable and rigid drive 24 mm steel shaft and a rigid, weight-saving Hollowtech." shimano xtr m9130 crankset (SB specific crank, 56.5 chainline) : 171 mm qfactor https://bike.shimano.com/en-US/product/component/xtr-m9100/FC-M9130-1.html Race face 56.5 chainline (flipped DM ring, approved by RF, solutions in chart) qfactors: Next SL: 170mm NextR: 176mm SixC(DH): 175mm Turbine: 180mm Atlas(DH):178mm Aeffect: 175mm Ride Cinch: 177mm Average: 175.85 Conclusion : 157+ qfactor doesn't deviate from average trailbikes qfactor.
gnaralized mikelevy's article
Oct 2, 2020 at 12:46
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: "You can also put your blinders on and pretend that aerodynamics don't matter but if you actually have eyes you can see that World Cup DH riders trim down their kits to the point of looking like they are wearing tights to be just a little faster" And until you prove me wrong there is still no evidence that a wider rear end will not lessen aerodynamic drag... Just in case you didn't get it the first time (obviously) : fluid dynamics is a too complex discipline and you need to take into account for too much parameters to make such hypothesis.
gnaralized mikelevy's article
Oct 2, 2020 at 12:35
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: from the Knolly page : www.knollybikes.com/engineering Q-FACTOR: 157mm hub spacing can be implemented using a flipped chain ring to maintain existing Q factors on XC / lightweight cranksets such as XTR, XO1 and Race Face Next SL Ask Noel Buckley, Knolly CEO and owner of several engineering degrees, sure he knows one thing or two about 157+ the guy from enduro-mtb never heard about... Now if you prefer trust a third league internet media vs a guy who create his brand from nothing...
gnaralized mikelevy's article
Oct 2, 2020 at 9:33
Oct 2, 2020
Video: Devinci's All-New Troy - First Look
@DoubleCrownAddict: And lately : “ I haven't even addressed the negative effects on q factor yet, anybody want to go there?” Q-factor is the saaaaaaame duuuuuuuude !!!! Only the chainline change by +3mm !!!!! You can even run a very narrow XTR m9130 crankset on Knolly 157+ bikes bwahahahahahahahaha !!!!!!!! With a 73mm BSA threaded BB !!!!!! 157 + is soooooooooo gooooooooood !!!!!
gnaralized jamessmurthwaite's article
Sep 30, 2020 at 7:26
Sep 30, 2020
Video: UK Mountain Rescue Are Trialling Jet Packs to Help Them Get to Patients Quicker
Ask Brook McDonald. Should send a memo to MSA paramedics...
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