Bicycle Gear Inches Calculator

Gear inches also show what gear ratio would be achieved with a drive wheel of the given diameter in inches as the gear inch value shows with the cranks directly attached using a penny.

Bicycle gear inches calculator. Yeah well back in the high wheeler years before 1866 or so the pedaling gear you had was determined by the diameter of the wheel because the crank was attached to it so one revolution of one meant one of the other too. You can use a chart to find the gear inches for you bicycles gear combinations. For that gear set what gradient of hill you can climb given your preferred cadence weight and power capabilities. Here is a complete bicycle gear ratio chart of the most commonly used bicycle chainring and cog sizes.

What speed could you achieve within your cadence range and how many gear inches does the gear equate to. The sram sachs 3 x 7 3 x 8 3 x 9 3 x 10 and the sturmey archer cs rf3 and cs rk3 are the only recent current production internal gear hubs designed to use rear sprocket clusters. Added option to see the gear ratio in gear inches options wheel size base gear inches. It can be used to compare different setups to find the optimal gearing for all kinds of bicycles.

The sturmey archer brompton bwr takes two sprockets but other models are included in the list for the benefit of tinkerers see discussion. The bicycle gear calculator displays graphically the gearing of derailleur gears and gear hubs. Gear inch calculator chart what s a gear inch. Gear inches is one of several relative measures of bicycle gearing giving an indication of the mechanical advantage of different gears.

What gears to choose for my bicycle. Colors group similar values. Values for gear inches typically range from 20 very low gearing via 70 medium gearing to 125 very high gearing. For each gear ratio.

Gear inches is actually the diameter in inches of the drive wheel of a penny farthing bicycle with equivalent gearing instead of what i wrote. What power is required to pedal at different speeds in different gears with and without a headwind. More than ever people ask nowadays. Hover over the cells to highlight and see the gearing information.

As in a car low gearing is for going up hills and high gearing is for going fast. Using the bicycle gear inch chart highligted in yellow on the chart are combinations that are about 45 gear inches. Old school 3 9 or more and more popular 2 10 or perhaps the newest addition by sram xx1 1 11.