the magnet is bolted to the spoke and the pick-up is zip-ties to the brake cable, then just run the wire up the cable to the handle bars and mount the computer to your desired position. whala, i maxed mph was 42!! yea boy.. oh yea, you need to calibrate it to your SPECIFIC wheel size, VERY!! important for accurate information.

 

i got one but gunna mount to rear tire see how long i can keep it on 1 4

 

yeah i got one on the back

 

i wanted to but the wire i got is too short, oh well

 

What size did you use?

 

1178mm i think, you need to do a roll out and measure it in millimeters. so get a start point with the valve stem at the bottom of the wheel, then roll it out till the valve stem does a COMPLETE 1 revolution and its back at the bottom. Then measure the beginning and end in mm. then depending on what computer you have, (i got a specialized bike computer).