This thread is kinda funny in light of another recent discussion re: external bearing triples, during which one commentator expressed reluctance to "fight" with various standards and incompatibilities of external BBs. Never used a VO BB, except the French ones, but I've used XD cranks hundreds of times with shimano, tange, truvativ, and phil BBs. Never a problem like this. I'd suggest trying a different bb.
On Jul 6, 12:50 am, oldmangabe <oldmang...@gmail.com> wrote: > 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.
