Their OD is too big for my ID. I have some concentric adapters that fit perfectly, however they have a shoulder that sits outside the BB and makes the BB about 7mm too wide for the motor. Tomorrow I am going to cut off the shoulders and insert the adapters flush. The cross bolts will stop them from moving closer and the motor will keep them from moving outward. they are a very snug press fit. This, while not ideal, will definitely work. I only need them as spacers for the motor shaft. I have learned a very important lesson on BB's with this build that I will not soon forget. You can see the adapter
HERE
Canyon
Links to Amazon may include affiliate code. If you click on an Amazon link and make a purchase, this forum may earn a small commission.