Home ♻		Pulleys Belts - RPM	Transmissions - RPM Tire Size - km/h - mph	Motorcycle Gearing Sprockets RPM km/h	Chain + Sprocket Calculator	Tire Size + Compare	Band Saw Calculator
Directory		Inch					Inch

Chain ⚙ Sprocket Calculator ▶ Chain Length ▶ Sprocket Centers▶ RPM & Gear Ratio ▶ Chain Speeds

Link Pitch (inches) or #25 ▶ 0.25" ~ 6.35mm #35 ▶ 0.375" ~ 9.53mm #41 ▶ 0.5" ~ 12.7mm #50 ▶ 0.625" ~ 15.88mm #60 ▶ 0.75" ~ 19.05mm #80 ▶ 1" ~ 25.4mm #100 ▶ 1.25" ~ 31.75mm #120 ▶ 1.5" ~ 38.1mm #140 ▶ 1.75" ~ 44.45mm #160 ▶ 2" ~ 50.8mm Small Teeth Small RPM Large Teeth ? ReAdjust Chain Links to maintain (nearest to) current Sprocket Centers as you change Sprocket Teeth. Lock Centers Chain Links ? Restrict to even number of chain links (Locked Centers only) Even Links Units Inch Decimal Inch Fraction Metric mm Dimensions ? Creates a link to save or Share current settings Share Current Settings

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.

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 mm inch Max RPM RPM Small

Sprocket RPM Diagram

---

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