Bottom bracket bmx help please?

Question

how do i find out my bb size, i have a wtp trust but am doing up ongoose motivator from 90s.

can i measure something or what?

Answer 1

Well im guessing the bottom bracket is quite big? The chances are its a USA bb. Thats what most bmx's use, especialy older ones.

Answer 2

http://www.physics.smu.edu/~scalise/appa...

http://en.wikipedia.org/wiki/Vernier_cal...

http://www.digitalcaliperfactoryoutlet.c...

You need a pair of Vernier Calipers to measure the Bottom Bracket.

Please see the links above.