Short answer, yes, it is more complicated than that. Going from 700c to 650b on a cantilever posted bike is almost certainly doomed to disappoint. Even if you have brakes that have massive range of adjustability, putting the brake pads a full 19mm lower than they should be is a huge move towards the squishier, higher MA (mechanical advantage) side of the spectrum. The brakes, if they can be set up at all, will most likely feel way too squishy at the lever. High cable pull levers (like V-levers) can mitigate that somewhat. Measure where your posts are on your frame. For example, I just measured on my 700c wheeled Hillborne. From the center of my rear axle to the center of the canti stud it measures ~285mm. My brake pads are right in the middle of their adjustability range, so I'd call that stud placement perfect. Ideally for 650B, the canti studs would be 19mm lower (700c=622mm diameter=311mm radius and 650B=584mm diameter=292mm radius 311-292=19mm). Measure yours. If yours are at 285 like mine, I'd be concerned. If yours are at 290, I'd say forget it. If however, they are on the low side, like 275, then your brake set-up might work OK. Good luck. Let me know if any of this is not clear.
On May 14, 10:12 am, Ray <r.sh...@sbcglobal.net> wrote: > I know that some of you are very familiar with these brakes. Can one > can use these brakes on a 700c sized frame to convert to 650B by > adjusting the pads lower on the brakes? Or, is it a lot more > complicated than that? -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
