Subject: question about bottom brackets and quarq so I'm wanting to add power to my road bike, which is a 2011 Trek Madone 4.5 - and I'm confused! First of all the bike is full Shimano 105, which I don't think is a problem with a quarq (which would be SRAM), but I want to make sure I'm correct on that. Second, From what I can tell the 2011 4.5 is not BB90, so I think it is 86.5? But then what's the deal with BB30, GXP, WTF, ETC.... (!?!) I have no idea what I should be looking to buy for this bike. Enter smart people... your help is greatly appreciated! (also in the market for something used, 175 crank length) Thanks for the info! |