Bottom Bracket spacers are made for exactly that purpose and wont mess up the integrity of the BB as long as you are following the recommended configurations. Having an external bb and 2x12 drivetrain might just inherently conflict with 2.6" tires on this frame unfortunately. What does Riv say is compatible? I wouldnt be surprised if they have a trick to make it work
On Thursday, June 25, 2020 at 8:39:33 PM UTC-4, David Wadstrup wrote: > > Hello, > > I've been building my Susie over the past couple of days, and just > discovered I've got an issue with the chain rubbing the rear tire when I'm > in the lowest gear. It's a Shimano 2x12 drivetrain, and seeing as it's not > a square taper BB, and has more than 9 speeds, I'm out of my league. The > tire is a 2.6 Teravail. Does anyone have experience with this kind of > problem? > > The only real solution I can think of is to add a 2.5mm spacer to the BB's > drive side. The chain just ever so slightly touches the tire now, and so > I'm hoping that moving the chainrings out 2.5mm will be enough to solve the > problem. BUT.... > > A part of me wonders whether this is advisable. Will my shifting be > compromised due to altering the chainline of the crank? Will widening the > space between the BB's cups harm the BB due to lessening the thread > engagement? Will it harm the cranks for the same reason? Is this solution > more of a problem than the rubbing problem? > > What about other solutions? Does anyone have any advice? This is driving > me crazy, and I'd really love to hear any and all suggestions! > > Thank you! > -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/83f0f8c6-67fc-4230-a03e-6c06f4cab4fao%40googlegroups.com.
