I have a bike or two with that much clearance for my inner ring, and have never had an issue, YMMV of course.
How much chainstay clearance do you have on the NDS crank arm? If you've got some wiggle room on the NDS, you could add a spacer to the bottom bracket on the driveside to give you a couple mm more clearance. Danny Madison, WI On Friday, January 30, 2026 at 11:20:15 AM UTC-6 [email protected] wrote: > I have a very similar setup on my Hillborne with a Spa Cycle TD-2 crank > with 44/28 chainrings going to a 9 speed cassette. I replaced the 110mm > bottom bracket that came with my Hillborne with a 115mm. Mine is also > close, but so far no issues and it has a good chainline. You may want to > replace it for peace of mind, but if you aren't rubbing, you're probably > fine. > > On Friday, January 30, 2026 at 8:32:58 AM UTC-8 kw wrote: > >> Hi, >> >> I just completed building my new Sam Hillborne (my first time building >> myself!). However, the inner chainring is very close to the chainstay and >> I’m wondering what is the minimum clearance that’s thought to be safe? Riv >> said the installed BB is 113mm. I wondering if I should get a 115mm or >> 118mm BB? I’m running a Spa Cycles RD2 crank 44/28 double to 9 speed >> cassette. Thanks for the help! >> >> -Ken >> >> [image: IMG_0303.jpeg] >> >> >> >> >> -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/ea11e88f-5b0c-4a97-8565-9d1cb1973c0cn%40googlegroups.com.
