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bjf in reply to @gbj_tester

Maybe, I can't remember whether the 127mm UN55 is symmetric. If it isn't, you've probably gone too far 🙂

I’ve been looking at the UN55 BB data online and although I can’t find anything for a 127, I have for a 122mm.

Stated length 122mm
Actual length 123.2mm
Right hand stick out 28.6mm
Left hand stick out 26.6mm

This should give me a 51.2mm chainline and with a 1mm spacer on the drive side a 52.2mm. 0.3mm out but I think I can deal with that.

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gbj_tester in reply to @bjf

0.3mm out but I think I can deal with that

The chances of your rear triangle being aligned within 0.5mm are quite small anyway.

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