BMX BB oddity...

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...

if i am right you need to get a one peice bottom bracket, and use that, and then tighten the bottom bracket the same as you would a normal cup and cone bottom bracket(ie the old style 3 pc ones on road/mtb bikes).Hope that makes sense!

yes... but can i get a one piece bottom bracket in anything other than usa size? where will i get a euro bb cup like that?

you might be able to bodge one of the fashined cup and cone bottom brackets to run with that. You need to try a prope bike shop, not an evans etc.they are not much, and you just need to bodge things

yeah... good call, i was thinking of maybe using some euro bb cups i have and file down the spindle to fit on... wont be great but will work!

hope it works they actually look like old fishbone(dmr) cranks, try contacting upgrade and see if they have spares!

not a bad idea.. will pop into a shop tomorrow, i was really hoping somebody would swoop and point me to a link to exactly what i need.

guessing its not that easy!

ahah..

http://cgi.ebay.co.uk/EMMELLE-BMX-MTB-bottom-bracket-1pc-to-3pc-152mm-RARE_W0QQitemZ250289767740QQcmdZViewItem?hash=item250289767740&_trkparms=72%3A12|39%3A1|66%3A2|65%3A12|240%3A1318&_trksid=p3286.c0.m14

looks like that!!

but those cups wont fit in my euro bb i can only assume
:(

http://www.wiggle.co.uk/p/Cycle/7/wethepeople_Euro_BB_Conversion_Kit/5360010065/

might work

nah... i have one of those already (well, euro bb cups) but the spindle wont fit through them cos of the threads. will work if i get the file out though

i am desperatly searching the net for the bottom bracket set i am talking about, but it is not there.where do you live?

me too! harrogate near leeds am afraid.. oop north i am!

aha.. how about cotterless bb sets?

http://www.remsonindustries.com/bicycleparts5.html

You may have some difficulty with a file, due to the hardness of the material.

i think you're right.. file wont work, its not even 19mm width by the looks of things, cotterless at my lbs tomorrow and we shall see

you horrible, filthy, leprous, fly-by-night, bmxing, fixed-wheel bandwagon-jumping harlots.