your pedal set up/ bikefit is probably all wrong, consult an experienced cyclist and show them your bike, and where your ankle hurts.
but this is merely an assumption, take what i say with a pinch of salt :)
@MaxC 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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your pedal set up/ bikefit is probably all wrong, consult an experienced cyclist and show them your bike, and where your ankle hurts.
but this is merely an assumption, take what i say with a pinch of salt :)