I have similar experience with Thomas. I recently put a XD500 crankset on my wife's Trek 620. The crank was previously mounted on a Shimano UN54 107mm bottom bracket and worked fine. I tried 2 bottom brackets I had in my parts bin--a 107mm IRD XB-75 bottom bracket and a 113mm VO bottom bracket, on both occasions the inner side of the crankset rubbed the teeth on the bottom bracket cups. The XD500 crankset has been in service for probably 4 years now.
On the VO BB, it wasn't even close. On the IRD, it was extremely close to being at maximum torque, so I simply reinstall it with just a hair of gap between the crank arm and the teeth. I did measure the VO BB to be of the right spindle length. Franklyn On Jul 5, 10:11 pm, CycloFiend <cyclofi...@earthlink.net> wrote: > on 7/5/10 9:25 PM, Thomas Lynn Skean at thomaslynnsk...@comcast.net wrote: > > > Don't know about symmetrical vs. asymmetrical. I can measure it when I > > get a chance. Wouldn't it be symmetrical unless otherwise indicated? > > Perhaps you're suggesting it's out of alignment somehow? > > Some of the Shimano ctg bb's were asymmetrical - longer to the driveside. > You can see it usually, but can confirm it with calipers. I didn't know if > maybe the VO bb was spec'd that way, and it somehow got reversed. > > > As far as I know, the BB cartridge and the drive-side cup are one unit > > on this BB; it was the drive-side crank arm that interfered with the > > BB. > > I'm pretty sure that those cartridges are press-fit into the "cup" on the > driveside. It's possible that the cartridge didn't seat properly, or > there's something wrong with the thickness of the "cup", which would move > everything towards the non-drive side. > > > > > It's the Grand Cru, not the threadless. > > > No, I simply assumed it was a 107mm since that's what I ordered and > > that's what the package said. In light of some having used a VO 103mm > > BB with an XD2 crank, I'll measure it to see what size the spindle > > actually is. I note that the inner chainring was not in contact with > > the chainstay; so I'm guessing it was a 107mm minimum (as I have heard > > elsewhere that a 107mm BB XD2 combination can lead to a tight > > chainstay/chainring clearance). > > With that kind of result, I'd definitely measure the spindle for starters. > Wouldn't be the first time that a package was mismarked/mispacked. > > Best of luck! > > - J > -- > Jim Edgar > cyclofi...@earthlink.net -- 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.
