Cateye velo wireless plus cycling computertake your training to the next level thanks to the wireless plus cycling computer from cateye. This device tracks your cycling speed, time and distance so that you can measure your output, set new goals and improve your performance.compatible tyresto give you fantastic accuracy the velo plus cycling computer requires you to attach a small magnetic sensor to your front wheel. This magnet is compatible with the following tyre types 16rdquo, 18rdquo, 20rdquo, 22rdquo, 24rdquo, 26rdquo, 27rdquo, 27.5rdquo, 700c and 29rdquometricsthe device records several different types of cycling metrics to help you track your cycling performance. The metrics includecurrent speedaverage speedmaximum speedpace arrowelapsed timetrip distancetotal distancefeatureswireless connectionincludes tool free bike mounting systemmaterial body made from engineering grade plasticbattery cr2032 x1　battery life approximately 1 yeardimensions 55.5 x 37 x 16.5mmweight 26.4gbuy cateye cycling gps from chain reaction cycles, the world's largest online bike store.