Originally Posted by
stringbreaker
Ok thats solved. I measured the frame where its machined for the bearing cups and its .515 in the new pieces for the BB adapter measure .587 or close to that so it looks like I'm going to have to take the adapter pieces to the lathe and face them off or at least put a lot bigger chamfer on them.
Hold up - this is a 3-piece adapter then? Is the spindle threaded or conventional? If threaded, the BB width shouldn't be an issue - like a standard Ashtabula crankset, the BB with may vary - the threaded adjustable bearing raceway and locknut take care of any slight width differences.
Take care,
-Kurt