Motorcycle Sprocket Size/Ratio Calculator

This easy online sprocket calculator will help you determine the effect that different sprockets will have on your motorbike and help you calculate the best sprocket sizes for your riding style.

Select current size of front and rear sprockets
as well as the new sizes.

	FRONT	REAR	LINKS
CURRENT
NEW

Link count is approximate.
Make sure chain is long enough before you cut it.

Front	Rear	Ratio	Torque	Speed
13T	46T	3.54	-4.3%	+4.3%
13T	47T	3.62	-2.1%	+2.1%
13T	48T	3.69
13T	49T	3.77	+2.0%	-2.0%
13T	50T	3.85	+4.0%	-4.0%
13T	51T	3.92	+5.9%	-5.9%
13T	52T	4.00	+7.7%	-7.7%

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