After reading through these comments I realize that I lack the understanding of how one would calculate the proper BB length for a particular crank- say, an XT M737 triple on my Hunqapillar? I've got a 113 on there now, but only because that's what came with the bike when it had the Sugino XD triple. It seems to work just fine.
At this point in my understanding, calculating such sounds like a mix of esoterica and wizardry. Cheers, John On Monday, January 27, 2025 at 9:09:32 AM UTC-8 Bill Lindsay wrote: > Let's list all the cranks for which 113mm is the perfect length. I'll > start: > > White Industries VBC 2x > > Bill Lindsay > El Cerrito, CA > > On Monday, January 27, 2025 at 8:07:45 AM UTC-8 isp...@gmail.com wrote: > >> Well... the SpaCycles UC Double is based on a triple chainline, and their >> website says you should be using a 119mm BB spindle. That's all fine, but >> it's not a typical use case. >> >> I'm just pointing out to the community that for the majority, who are >> using a double crank intended for a double chainline, that Riv's included >> BB runs a wide of that chainline. And that BB doesn't even match Riv's >> Silver-branded double let alone other typical double specs on the market. >> That BB is only chosen to mate well with their "skeleton key" front >> derailleur, which also doesn't seem optimized for typical double cranks >> (nor theirs). >> >> Riv admits on their website that they're spec'ing as many Microshift >> items as possible to gain favor with that vendor (to further encourage >> their collab on a Silver-branded Microshift drivetrain). The BB spec is a >> loopy business decision where the average user is getting a BB that won't >> give optimum alignment, and the user can't request an alternative BB (i.e. >> swap at no cost). I'm less concerned from a cost perspective (since the BBs >> they sell are affordable), but it affects a person's build parts list and >> timeline. It's a setup for surprising a lot of people with a mismatch. > > -- 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 visit https://groups.google.com/d/msgid/rbw-owners-bunch/cbe29fc5-5599-4ca4-bfab-3e26a7362898n%40googlegroups.com.
