Gear Ratio Calculator
Work out your axle ratio from ring & pinion teeth, and your engine RPM at highway speed for any ratio, tire size and overdrive.
Eskimo Auto & Truck Parts — Gear Ratio Calculator
https://www.eskimoautoandtruckparts.com/tools/gear-ratio · (780) 473-2424
Reference only — verify against your owner's manual or factory service information before performing any work. Full terms: https://www.eskimoautoandtruckparts.com/tools/terms
Ring & pinion → ratio
Count the teeth on both gears (or read the stamping, e.g. 41-11).
Axle ratio
3.73:1
Common all-round gearing
Engine RPM at speed
Locked converter / no slip. Top-gear ratio: OD is often 0.65–0.75, direct is 1.00.
Engine speed at 100 km/h
1,726 RPM
Comfortable cruising range
Tip: get your tire's true diameter from our tire size calculator.
Re-gearing or swapping an axle? Use the rear diff identifier to confirm what you have, then request a complete differential from our yard.
Reference information only, provided "as is" without warranty. Specs vary by exact vehicle, trim, and production date — always verify torque figures, capacities, and fitment against your owner's manual or factory service information before performing any work. Tool Terms of Use.
Need the part, not just the numbers?
1,200+ vehicles and 150,000+ parts in our Edmonton yard — tested, warrantied, shipped.