Bicycle Gear Inch Calculator

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.

Bicycle gear inch calculator. Hover over the cells to highlight and see the gearing information. You can see that with every combination of chainring in the front and cog in the back you can get close to 45 gear inches. That is combo bike history and trivia but is relevant if you wanna know which is lower a 34frong x 36rear or a 24front x 32 rear. Too high tech for you.

You can use a chart to find the gear inches for you bicycles gear combinations. Add mm if required. 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. When chain drive bikes came on the scene the gear inch calculation was adapted to accommodate.

Using the bicycle gear inch chart highligted in yellow on the chart are combinations that are about 45 gear inches. Gear inches is one of several relative measures of bicycle gearing giving an indication of the mechanical advantage of different gears. Gear charts like this tend to bring out the inner weirdo extreme bike geek in all of us. The original calculator page is here.

It can be used to compare different setups to find the optimal gearing for all kinds of bicycles. 20 24 26 700c 27 650b 29 tyre dia. Chainring teeth cog teeth x rear wheel diameter wheel tire gear. Values for gear inches typically range from 20 very low gearing via 70 medium gearing to 125 very high gearing.

80 is green 50ish 80 blue and below 50 red. Colors group similar values. Originally gear inches represented the diameter of a high wheel bicycle s drive wheel. As in a car low gearing is for going up hills and high gearing is for going fast.

Here is a complete bicycle gear ratio chart of the most commonly used bicycle chainring and cog sizes. The lower the gear inch number the easier the gear. Home gear inch calculator chart. Gear inches offer a simple system for measuring bicycle gear values.

The bicycle gear calculator displays graphically the gearing of derailleur gears and gear hubs.