The last issue of Bicycle Quarterly reviewed a bike (name??) that has, if I remember correctly, a bottom bracket height of only 235mm. Jan Heine reported that he had no real problem with pedal strike, but could hit the rings taking it over curbs. I doubt if a Ram or Rom would be that low.
I'm still looking forward to taking possesion of my new, custom Bilenky tandem this spring, but not too far down the road I want to convert my 25" 1984 Trek 620 to 650B, with couplers. My Rambouillet still remains my favorite ride, but it's great to be able to have a variety of rides to choose from. Michael H 1983 SpecializedSequoia (My Wife's ride) 1984 Trek 620 1988 Custom Marinoni Stage Racing Bike 2000 Soma Dbl Cross 2004 Rambouillet 2007 Ebisu All Purpose 2010 Bilenkey Touring, Travel Tandem On Jan 13, 8:22 am, Steve Palincsar <palin...@his.com> wrote: > On Wed, 2010-01-13 at 07:39 -0500, Larry Powers wrote: > > If I recall correctly the Rambo is not a could candidate for a 650b > > conversion becuase it has low bottom bracket to start with. Someone > > let me know if this is not true. > > The Rambouillet does indeed have a low bottom bracket -- and it was > designed for 28mm tires. No matter which 650B you put in there, even > the Hetre, there'd be additional drop; and I'm not at all certain > there's clearance for a Hetre. > > On the other hand, it's not just bottom bracket drop, it's the > combination of bottom bracket drop + crank length that causes the pedal > strike problem. If you used shorter cranks, you could compensate to > some extent.
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