Sounds like wobbly discs. I think you can sometimes fix them but replacement shouldn't be too pricey. Depends on the car though. What make / model?
@kboy 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.
Sounds like wobbly discs. I think you can sometimes fix them but replacement shouldn't be too pricey. Depends on the car though. What make / model?