A square taper BB is $20. Not a big deal. On Jan 21, 10:21 pm, William <tapebu...@gmail.com> wrote: > The geometry is not all that hard to figure out. A few mm of length change > will change your clearance by a few mm. A few degrees of extra lean before > you scrape. Pedal scrapes during a deep lean can be incredibly dangerous. > > In my opinion, it is much more important to have the right length for > pedalling than it is to have the right length for max turning clearance. I > ride 172.5mm on all my bikes and when I ride my wife's Betty areound the > block, the 165mm arms on there feel like a midget bike to me. Alot of the > fixie crowd run 165's to promote spinning, but on a geared bike, my > instinct tells me that 165s would be a mistake. Narrow width platform > pedals, like the grip kings, could make more of a difference than crankarm > length, if you want to experiment more affordably. > > There's a semi-famous Greg Lemond quote about pedal clearance. He said "if > you think you need to pedal through a corner, you weren't going fast enough > into the turn". That's from a purely racer perspective. > > > > > > > > On Monday, January 21, 2013 11:33:47 AM UTC-8, Dave wrote: > > > Hey hey, > > Question about crank length and possible change. I'm riding a 59 bleriot > > protovelo that I bought used with a 175mm shimano 105 cranks on it. The > > pedal strike I get is kind of avoidable,but still present frequently. > > I've tried the mks stream pedals that it came with, along with the gr-9 > > platform pedals. With toe clips, they strike the ground if moving the > > bike without my feet in them. Any hard turns are problematic if you need > > to pedal through. > > > How much difference do you think moving to 165mm sugino xd2 cranks would > > provide? I'm not sure of the Q factor on the shimano cranks, or how new > > cranks would work with my bottom bracket (not entirely sure what's in > > there)....so not sure if any of these questions can be answered.
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