Bicycles & Motorcycles

Gear ratios, gear inches, cadence and speed per gear.

• Bicycle Gear Calculator Gear ratio, gear inches and development for a chainring and sprocket combination, with the speed at a chosen cadence.
• Cycling Cadence and Speed Calculator Speed from cadence and gear, or the cadence a speed needs in a given gear — for choosing gears and checking a bike computer.
• Motorcycle Gear Ratio Calculator Final drive and overall ratios, and road speed at any rpm in any gear — and what changing a sprocket does to all of them.