have you got the right size spanner as found in a bike tool kit?
if that doesn't work is there some way of drilling/cutting it to split it or something?
Or go to a workshop with a vice, grip the cup in the vice and turn the frame around it.
Are you turning it in the correct direction as well?
@TM 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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have you got the right size spanner as found in a bike tool kit?
if that doesn't work is there some way of drilling/cutting it to split it or something?
Or go to a workshop with a vice, grip the cup in the vice and turn the frame around it.
Are you turning it in the correct direction as well?