I second the Garmin basic strap - It's the only one I've ever used and have no complaints. Wet the contacts before strapping up and ensure the strap is tight enough and you should never have any reading errors.
@pifko 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 second the Garmin basic strap - It's the only one I've ever used and have no complaints. Wet the contacts before strapping up and ensure the strap is tight enough and you should never have any reading errors.