Rotor BSA30 uses outboard bearings so the spindle length of the BB30 crank would be too short .. shell width of BB30 (road) is 68mm with internal bearings .. I thought along similar lines for a past project. There was a dodge that I saw someone used on the Weight Weenies board once of using a Cannondale crank with a mountain spindle and some custom machined cups with thin bearings.
Rotor BSA30 uses outboard bearings so the spindle length of the BB30 crank would be too short .. shell width of BB30 (road) is 68mm with internal bearings .. I thought along similar lines for a past project. There was a dodge that I saw someone used on the Weight Weenies board once of using a Cannondale crank with a mountain spindle and some custom machined cups with thin bearings.