iGearCalc 1.2 (Mobile)

You have a lot of gears on your bike, want to know how fast youre going at 80 RPM? Maybe you want to know something more obscure like your gear inches or meters developed. Let Gear Calc do the calculations for you.Select your cluster from the list of common clusters or customized it, select your chainring(s), your crank length and tire size and Gear Calc will tell you your speed at a chosen RPM, gear ratios, gain, gear inches and meters developed for each gear.Gear Calc will also graphically display the speed in a user selectable range of RPMs. Gear Calc will display the results in either KPH or MPH.