I am putting my money on it being the crank not being machined properly. On the drive side, at the square taper interface, the cranks should be turned down a bit so that one can run a short BB spindle. This will allow the cranks to snug into the driveside bb cup without binding the crank to the cup, or to the bearing. I've seen maybe 3-4 Sugino cranksets, all of them being of the XD variety (Sugino's basic 110 and 130 bcd crank design sold to various importers) over the last couple of years not have this machining. It basically causes the crank to bottom out on the driveside cup much too soon, as the original poster has pointed out. If one uses a longer spindle BB, then it does not happen, but when you are trying to get a good chainline (singlespeed, multispeed) or a lower Q-factor, this can happen with an improperly machined crank. It sounds like you should contact Rivendell about getting a replacement crankset. Good luck. Gabe
On Jul 4, 7:43 pm, Thomas Lynn Skean <thomaslynnsk...@comcast.net> wrote: > Hi! > > I tried to mount a Sugino XD2 crank from RBW on a 107mm VO bottom > bracket and couldn't make it work. Mounting the crank onto the > spindle, before I had slid it on far enough to get the appropriate > torque on the crank bolt, the inner portion of the crank arm > interfered with the bottom bracket itself! At first when I was having > trouble turning the cranks I thought... hmmm, did I ruin a bearing or > something? But no, it was just that the crank arm was literally jammed > up against the bottom bracket itself. Just plain weird. > > Anyway, I suspect both the VO bottom bracket and the XD2 crank I have > are perfectly fine normal examples of their kind. And I suspect the VO > BB is a fine product in general, as is the XD2 crank. They just didn't > work together for me. > > The only other bottom bracket I had lying around was a 113mm Truvativ, > which turns just fine for now. When it shows age, I may replace it > with a larger VO. I wasn't really very close to the required torque on > the crank when it came in contact with the bottom bracket. It isn't > obvious that a 110mm VO bottom bracket would work. I suspect a 113mm > would, though. > > Perhaps I should just get the 107mm from RBW. This would give me the > intended chainline. However, I'm going to eyeball carefully my current > set up. I haven't concerned myself with Q-factor up to this point; > longer spindles on a bottom bracket don't bother me as long as the > chainline is reasonable for how I ride. I need to give that more > thought. I may even go with a 118mm BB if the chainline is okay. At > that point, the crank arms might just slip right past the two-legged > Pletscher kickstand when its deployed. That basically turns the > kickstand into a work stand. (That and a couple of ceiling-mounted $3 > bicycle hooks were the only stand I used to the build the bike up with > in the first place.) > > Anyway... just in case anybody else tries the 107mm VO BB with an XD2 > crank. I wouldn't expect it to work right out of the box. > > Yours, > Thomas Lynn Skean -- 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-bu...@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.
