Diablosport Forums

From various posts here, I found I wasn't alone having problems getting my speedometer to read correctly. Differences in tire's actual size to labeled size, rim width, air pressure, etc. all seem to come into play. What worked for me was to actually input "rolling diameter" instead of actual height of tire. Just measure rolling radius (from ground to center of wheel, vehicle sitting on ground) and double that reading. Entering your calculated value into the DS for tire height should get you going the proper speed.

Nice info, thanks for the heads up.

Also a Garmin works great. Adjust until you are on the money with a Garmin

Garmin works, but I think the way Edon did it gets you way closer for the first time user.