Don't use a hammer is my advice, use a pipe wrench or some large Mole grips to squeeze it closed again - if it ends up slightly bent along the axis of the bike, use a large adjustable to bend it back.
@retrodicorsa started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Don't use a hammer is my advice, use a pipe wrench or some large Mole grips to squeeze it closed again - if it ends up slightly bent along the axis of the bike, use a large adjustable to bend it back.