#
Calculate

This is a calculator you can use to check what speed different ratios in gearbox and cogs on wheels gives.

This calculator is based on that you known what revs you have at a particular speed ie 5000 revs at 80mph.

**First part: **Type in known revs / speed ( **KM/H or MPH, not both **) ,

what cogs you have on crank, clutch, engine & wheel.

What you get from this calculation is gearbox ratio and circumference of the rear wheel.

**Start here and then go over to Second part.**

**Second part: **Type in revs ,

Laborate with changes in cogs you have on crank, clutch, engine & wheel.

What you get from this calculation is different speed according to changes in revs / wheel and gearbox ratio.

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© 2012 Rickard Nebrér www.b50.org