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♻ 		Pulleys
Belts - RPM 		Transmissions - RPM
Tire Size - km/h - mph 		Motorcycle Gearing
Sprockets RPM km/h 		Chain + Sprocket
Calculator 		Tire Size
+ Compare 		Band Saw
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Chain ⚙ Sprocket Calculator ▶ Chain Length ▶ Sprocket Centers▶ RPM & Gear Ratio ▶ Chain Speeds

Link Pitch (inches) or
Small Teeth Small RPM
Large Teeth
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ReAdjust Chain Links to maintain (nearest to) current Sprocket Centers as you change Sprocket Teeth.
Chain Links
Units
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Small Teeth Large Teeth
Chain Links Scale
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Every 16 chain revolutions the same tooth on the SMALL sprocket contacts the same chain link = 0% optimal wear rate
Every 16 chain revolutions the same tooth on the LARGE sprocket contacts the same chain link = 0% optimal wear rate
The lower the chain revolutions, the more frequently each chain link engages the same sprocket tooth, so greater and more uneven the wear.

Chain link adjustment When changing sprockets, you can adjust Chain Links to maintain (nearest to) current Sprocket Centers (eg: to keep motorcycle rear wheel within adjustment range). Check Lock Centers and adjust sprockets - Chain links will adjust to maintain nearest to current Sprocket Centers.


Tire Diameter on Large Sprocket

Max RPM
RPM Small



Sprocket RPM Diagram

← If changing sprockets throws your speedometer out, find the error for each sprocket combination.



DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
And if you're cutting wet, wear a mask - theres dust in the spray mist too!

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Inch or Metric? 👈
The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm)
Directly under the main tab is a smaller 'Inch' tab for the Feet and Inch version.
Drop Down Menus have M for Metric Versions.
Metric
Calculator
Inch


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