This works as it should. Set up could have been simpler but not too bad. First, determine the circumference of the tire. Mind you mine was a 2105 for a 700 25mm tire. When I set the setting it worked in reverse, I had to set it up starting with 5-0-1-2 to enter 2105. It says 2105. You're working right to left when you type that inside. There is another problem, the magnet is not tight enough on the spoke. I put a very small piece of tape between the two pieces that snap to the spoke when you tighten the screw to make it tighter. Also, if you're mounting the computer on the handlebars, make sure you position the part it slides on so that the small lever faces the rear of the bike. Otherwise it works in reverse. Update: A year later and it's still working fine. and it's very accurate.
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