Bicycle Mechanics - using an american BB in a mid BB shell w/o the cups?

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA
enormungus
05-24-08, 06:29 PM
Just a quick question. I may be buying a new frame soon that uses a mid BB. My question is, if I take the bearing cups off my american BB bearings, would it work with the mid BB shell?

HillRider
05-24-08, 06:31 PM
What's a "mid bottom bracket"?
enormungus
05-24-08, 06:42 PM
it uses the same size bearings as an american BB but the bearing fit dirctly into the BB shell w/o the cups. You can buy american, mid, euro, spanish, etc type of bottom brackets, but Im not sure if the only difference between the american and mid BB's is that one uses bearing cups while the other doesn't. Most new bmx frames(for street/dirt/park not race) come with mid BB shells. I found this: http://www.danscomp.com/serve.php?serve=faq&html=bb_diagram.htm

HillRider
05-24-08, 07:01 PM
Hmm, that's a new one to me. I expect you will get better info on the BMX forum right below this one.
enormungus
05-24-08, 07:29 PM
That was going to be my next try. Thanks for trying to help tho.