Sugino introduced proprietary taper in 2015. Riv stopped listing Sugino cranks for sale by 2020, instead having Silver and Clipper cranks, but I never heard it being related to the taper. Still, given that the crank is $250 and a Sugino bb is $40, I'd get the the correct taper bb.
On Sunday, October 5, 2025 at 7:48:55 PM UTC-7 Joe Bernard wrote: > Indeed, I'd never even heard of XD cranks having a proprietary taper. Riv > has been putting them on JIS spindles for 31 years, I've done it almost > that long including on my current 3 bikes. > > On Sunday, October 5, 2025 at 5:48:41 PM UTC-7 [email protected] > wrote: > >> I'd bet at least a sixer that the vast majority of Sugino XD crankarms >> ever installed in North America were attached to JIS-tapered spindles. >> That's what Tange used, and since Tange made Shimano's cartridge bottom >> brackets as well as their own, almost all of those spindles are Tanges. >> >> And the XD arms have been around for like 25 years now. If it was any >> kind of problem at all, it'd be a well known problem. >> >> Depending on the length of the BB that's already in the frame, I'd just >> run with it. As far as length, I've seen both 110 and 113 recommended. With >> a friction front, the difference is unlikely to matter. >> >> FWIW, I just installed a 48/39/26 XD2 on my 1981 Probable Peugeot PKN-10, >> replacing the mismatched Sugino VT / SR Custom triple-with-2-rings kit-bash >> that the guy I bought it from had bodged onto the bike. I didn't bother >> measuring the BB, just slapped that sucker on there. The narrow, and >> crappy, Campy 980 front derailleur needed some adjusting, but it works as >> well as it did before. Which ain't great, but it's a 980 and they suck. >> >> TL;DR - It's not going to break anything, and will almost certainly Just >> Work. >> >> --Shannon >> On Sunday, October 5, 2025 at 4:57:45 PM UTC-7 Jim M. wrote: >> >>> On Sunday, October 5, 2025 at 11:43:55 AM UTC-7 [email protected] >>> wrote: >>> >>> Thanks, Jim! I wonder if I can just use the Shimano JIS BB that the bike >>> frame comes with, instead of buying a new BB. >>> >>> Ah, I didn't realize Roadini came with a bb. Well, in my mind, if the >>> fit isn't just right, the less expensive steel bb is going to put more wear >>> on the expensive aluminum crank. I'd rather start with the correct bb. >>> >> -- 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/2288f2da-ef9d-42dd-85af-dcdc0b469ff3n%40googlegroups.com.
