I am not expert enough to explain where the differences come from, but different cranks use different bb spindle lengths to get the same configuration. The Sugino AT's just happen to use a relatively long spindle but once installed they clear the chainstays exactly as they should. That said, being a triple, the Q factor is going to be more than a double.
Sheldon's BB chart is here: https://www.sheldonbrown.com/bbsize.html (scroll down to the Sugino section for the Sugino AT) I wish there were more Q factors filled in but hopefully there is enough info there to do some comparisons. If you do go with a double, the IRD compact double (46/30) might be on your list... I have that on a Hilsen and it works great. I am sure there are other great options as well. http://boulderbicycle.bike/IRD-Compact-Crank-46-30-assorted-lengths.html Hopefully other AT users (or ??) will chime in with more knowledge and experience... Bob On Sunday, April 25, 2021 at 5:41:04 PM UTC-5 Joe M. wrote: > Crank length 170mm. The AT's are really nice. I'm afraid that going with > that wide of a BB may not feel right. Can you folks with experience with > the AT shed some light on this? I'm 5'10 with a PBH of 85. I imagine if I > was taller I may not notice the wide Q. I don't have experience with > anything that wide. Thanks! > > > -- 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/66645000-6497-4480-a784-b9291dce3866n%40googlegroups.com.
