Check and tighten (if needed) pedal arms/bolts/whatever they're called.
If unsealed bearings in pedals of hubs, take apart and regrease.
@Donut! 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.
Check and tighten (if needed) pedal arms/bolts/whatever they're called.
If unsealed bearings in pedals of hubs, take apart and regrease.