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@tilover
ok,
have had some experiences with bmx bbs,
USA bb... large shel - big enough to fit a 1 peice crank through, almost always unsealed
euro bb shell - same as most european mtb/road, shimano bbs are euro threaded and width, many bmx are the same allowing you to run primo excel cranks for example on a mstandard mtb or road frame
so... i bought some cheap cranks of ebay.. (very cheap) 3 piece with an 8 spline bb and some washers/unsealed caged loose bearings etc
but.. the spindle has threads!! either side of the splines wear the bearing would normally sit. but no cups... how do i mount these to the frame?
are these designed for a usa bb? can i get a cup to mount the crank on on a euro bb?
i am confused. help me.
crap pic...