Gear Ratio Calculator Road Bike

20 24 26 700c 27 650b 29 tyre dia.

Gear ratio calculator road bike. Ratio of the highest gear of your setup. The selection of internal gear hubs in the calculator is complete except for one a few new models whose gear ratios have not been made public and some very rare antiques. Ratio of the lowest gear of your setup. 0 20 mm 23 25 28 32 35 38 44 50 56 1 00 in.

Bicycle gear size and cadence speed calculator wheel size. The bicycle gear calculator displays graphically the gearing of derailleur gears and gear hubs. We can estimate that froome spent most of his time using a 38x21 gear ratio. In keeping with tradition the nominal wheel diameter used for road bike gear inches calculations is 27in.

Add mm if required. Here is a complete bicycle gear ratio chart of the most commonly used bicycle chainring and cog sizes. Accuracy to a single inch is all that s needed so they re rounded. 1 25 1 5 1 75 1 95 2 00 2 10 2 125 2 20 2 25 2 30 2 35 2 40 â ƒother in.

It can be used to compare different setups to find the optimal gearing for all kinds of bicycles. The original calculator page is here. Colors group similar values. That gives you the size of a high wheeler with the same gear.

3 is green 2 3 blue and below 2 red. The selection of cassettes is up to date as of february 2018 for shimano sram sunrace and recent campagnolo models. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. Hover over the cells to highlight and see the gearing information.

To calculate a gear in inches you multiply the raw gear ratio by the wheel diameter. Colors group similar values. Similarly if you are growing in strength it might be time to spec larger gears to your bike. 20 is green 10ish 20 blue and below 10 red.