Don't have one on my Racing USA Comp, but when i ride it i only go on a route that i know the mileage of. Just have to keep track of my mileage. BTW, i use a Schwinn computer on my daily ride that i bought at WalMart a few years ago for 9.00. I usually have it on the scan function that rotates to display speed-max speed-avg speed- and ride time. I really can imagine riding without it. Also have a base unit on my Fuji Cambridge III (fenders for the rain) so i can move the computer from bike to bike in an instant.