Getting Started in 3 easy steps
each field change, all results are recalculated automatically. Read the tables
for results or click the graph buttons to turn the result tables
Final Drive sprocket changes and their consequences
Below a table containing all possible final drive (Front & Rear sprockets) changes and their results on Speed, Torque and Rear Wheel adjustment. As a rule of thumb, changing the front sprocket with 1 tooth, amounts to the same effect as changing the rear sprocket with 3 teeth in the opposite direction (front +, rear --- and front -, rear +++) . This does not exactly apply to every bike but as a rule of thumb it will do and explains the results in the table below.
Where <- - - - - - - -> means move it more than <- -> of course.
Rear wheel adjustments assuming you keep the current chain !
As you can see, adding a front tooth and keeping the rear unchanged has about 3 times more effect on the speed than removing 1 tooth in the rear and keeping front unchanged. Changing only the rear with 1 tooth does not have a big effect, in combination with also changing the front it can either amplify or weaken the total effect and can be used for fine tuning.
When you change more than just 1 tooth in front and/or rear, the results will increase significantly of course.
The exact increase or decrease for your bike can be calculated using the Gearing Commander tables.
More help on Gearing Basics and the effect of changing tire sizes, see: