I have two Sugino XD2’s on different bikes that Sugino also says have the Mighty Taper and say to use the CBBAL bottom bracket. I’ve been riding one on a Shimano UN300 and the other on a Tange cup and cone… for a couple of years with no issues. Maybe I’m wrong for it, but it’s worked for me.
Mike

On Oct 5, 2025, at 3:30 PM, Joe Bernard <[email protected]> wrote:

You can try it and see how it looks. Unless I have math backwards that crank won't slide very far up the spindle tapers, that's a "ride at your own risk" situation.*

*I'd buy the matching 110mm Mighty BB

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.

On Sun, Oct 5, 2025 at 12:50 PM Jim M. <[email protected]> wrote:
Maybe use the recommended Sugino bb?

jim m
walnut creek ca

On Sunday, October 5, 2025 at 4:10:13 AM UTC-7 [email protected] wrote:
Hello!

I've ordered a Roadini frame and am very excited to become a new riv bike owner. I'm considering the Sugino Alpina 2 triple crankset, but I'm not sure the right BB that it should be paired with on a Roadini frame. 

Sugino's website says the crankram interface is their Might taper. I found reports that it fits the JIS taper spindle but will have increased chainline. Some others reported it's closer to ISO than to JIS. 

Has anyone also used Sugino's crankset, and which BB spindle length do you recommend? Thank you!

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