On Monday, July 13, 2015 at 3:26:47 PM UTC-4, mho wrote: > > Does the top tube height change much when you go from 700c 28 (or 33 Jack > Brown) to 650b 42? >
Corrected version! I'll confess, I did not physically measure my actual top-tube-height prior to converting (and, I haven't after-the-fact either, actually). But yes, the top-tube will drop a little bit. The Ram was targeted to fit the RolyPoly, which is pretty much a 700c-27 in actuality. (I ran the RuffyTuffy version instead.) The Hetres (although usually called a 42, is probably more like a 650b-41), should be really close to the same size. In 700c, I ended up later running 32's, so there was a little more drop w/ it, gave me acceptable fender clearance. But if you're running a smaller 700c tire, like the 700c-27, it might be, what, 1mm or so? (I did the math back at the time ahead of actually converting, to see what it might look like... but don't recall the exact figure off the top of my head). A bigger 700c-28, or a 700c-32, is going to be a little bit more noticeable, in having the top-tube drop a little bit when straddling. It would be even more pronounced if you went on down to a 650b-38... at that point, you will start to have a lot more issues w/ crank-length, and would be losing some of the fatter-tire advantage of going to a 650b in the first place. (Realize, this is coming from the guy running 700c-40's on his canti-Rom... I can ride them at 50psi or less, but if I pump up the rear tire above 60psi, I can start to hear the center-tread brushing the screw that I used to plug the hole underneath the rear bridge (I left the screw just a tiny bit proud from the bridge itself instead of fully flush, just to be an 'indicator' that I need to back the psi off).) -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
