Technical & Reference Section > Tech and Restoration

Bottom Bracket help needed

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kenloen:
Hi,

I am new to bmx builds and need some help. I have bought a 86 PK ripper frame and forks to build and have been getting a few bits and bobs. So I just got hold of a Profile racing 3 peice crank and now I need a bottom bracket. I know the spindle axel is 19mm and if I knock the old cups out of the frame the inside frame measures 52mm.

can anyone advise what kind of BB I need, or are they generic for all frames and just the axel size differs?

cheers Jason

wildon:
Will be a US bb .. any cup that size will fit .. spindle sizes differ, should be pretty easy to find a Profile bb for that  :daumenhoch:

Betty:
This is what you need....  :daumenhoch:

http://cgi.ebay.co.uk/bmx-bike-diamondback-sealed-bearing-bottom-bracket-bmx-/270738272827?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item3f0942323b#ht_600wt_905

kenloen:
many thanks!! On a roll..


soz for double post.

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