Check out these things https://www.sjscycles.co.uk/bottom-brackets/trickstuff-excentriker/
Me, spending £170 on a BB
If you don't know me by now...
I personally would be more likely to try weld on some track forkends than fork out for that. Or just throw the frame in the bin and buy a new one. It's a nice bit of engineering though
@frankenbike started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Check out these things
https://www.sjscycles.co.uk/bottom-brackets/trickstuff-excentriker/