# Gear Ratio Calculator for Tire Size

Find the axle ratio that restores stock drivability after a Tacoma tire size change. See the effective ratio you lose and the regear needed for 33s or 35s.

## Canonical URL
https://tacotires.com/gear-ratio-calculator

## What It Does
- Ratio to restore: The numerically higher axle ratio that returns the truck to its stock effective gearing on larger tires.
- Effective ratio lost: The lower effective ratio you actually run if you keep the stock axle with bigger tires.
- Tacoma regear guidance: Rules of thumb by tire size, factory ratios by generation, and the nearest ratio shops actually cut.

## Summary
- Calculates the axle ratio needed to restore stock feel after a tire diameter change.
- Shows the effective ratio you are left with on the old axle and the nearest stocked regear ratio.
- Community guidance: 33s usually go to 4.88 and 35s to 4.88 or 5.29, with front and rear regeared together.

## FAQ
### What gears do I need for 33 inch tires on a Tacoma?
Most owners moving to 33s regear to 4.88, or 4.56 for a mostly-street truck. Enter your exact sizes and stock ratio above for the calculated target.

### 4.56 or 4.88 for a Tacoma?
4.56 is the milder, more street-friendly choice for 33s; 4.88 restores more low-end torque and is the common pick for 33s that see trail use or added weight.

### Do I have to regear both axles?
Yes. The front and rear must be regeared to the same ratio together, and e-locker trims need a locker-compatible gear kit.

## Related Tools
- [Cruising RPM calculator](https://tacotires.com/rpm-calculator)
- [Speedometer](https://tacotires.com/speedometer-correction-calculator)

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