Easy Gear Calculator

This calculator will tell you how easy it will be to ride a bike up a hill. You could use it to check whether your new bike will climb as well as your old one. Or you might want to see how much of a difference changing a cassette will make, or what chainring size to use. It works for all types of bikes.
?
x
One of these numbers will be written on the side of the tyre
Please select a wheel size
!
?
x
This measurement will be written on the inside of the crank arm, or you could measure the straight-line distance between the centre of the pedal eyelet and the centre of the bottom bracket
mm
Unusual crank length; normal length is 160-190mm
!
?
x
This might be written somewhere on the chainring, or just count the teeth
Unusual chainring size; generally smallest chainrings are under 50
!
?
x
This might be written somewhere on the cassette, or just count the teeth
Unusual sprocket (cog) size; generally biggest sprockets are over 24
!
Result:
0.00
Easy
Hard

What does this number mean? Well, it’s called a Gain Ratio, and the lower it is, the easier it’ll be to turn the pedals when you’re climbing a hill.

Some great components are available to let you alter your gain ratio to change the way your bike performs. We recommend Wiggle Online Cycle Shop or Chain Reaction Cycles for your parts.