If its mid BB get this (and a load of extra strong loctite)
https://www.amazon.co.uk/Truvativ-Bottom-Bracket-American-Euro-Adaptor/dp/B000VT550K
Then you can run whatever you like, some cheap square tapers, maybe some high rise bars and you've got a great fun bruiser bike
ah that is interesting, does this look like the right loctite to get if going that route?
https://www.ebay.co.uk/itm/LOCTITE-638-HIGH-STRENGTH-RETAINING-COMPOUND-METAL-ADHESIVE-GLUE-10-ML/262997924301?epid=902894603&hash=item3d3be5d9cd%3Ag%3A2S4AAOSwstxVRe8u&_sacat=0&_nkw=loctite+retaining&_from=R40&rt=nc&_trksid=m570.l1313
(Sorry for thread hijack everyone)
Yes I think thats the one I used, Make sure there is no paint on the BB shell for extra grip.
@MCamb started
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If its mid BB get this (and a load of extra strong loctite)
https://www.amazon.co.uk/Truvativ-Bottom-Bracket-American-Euro-Adaptor/dp/B000VT550K
Then you can run whatever you like, some cheap square tapers, maybe some high rise bars and you've got a great fun bruiser bike