My wife bought a 5W for her recumbent trike and had nothing but problems with it. It was terribly inaccurate, even after setting the tire size several times (I use the rollout method), it seldom started when the bike started to roll and sometimes took a mile or two before it would start tracking. She took it back to the dealer and got another one, but it wasn't any better than the first one. We still have it but it's no longer used. She replaced it with an inexpensive Sigma after she bought her Garmin Forerunner.