I have used black ones. The spring tension is a bit weak, so not safe for skid stopping, but should be fine for MTB
@skim 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.
I have used black ones. The spring tension is a bit weak, so not safe for skid stopping, but should be fine for MTB