Tire Size Calculator
Calculate and compare tire sizes
Current Tire
- Width
- 215 mm
- Sidewall
- 118.25 mm
- Diameter
- 668.30 mm
- Circumference
- 2099.5 mm
- Revs / km
- 476.3 rev/km
New Tire
- Width
- 225 mm
- Sidewall
- 112.50 mm
- Diameter
- 656.80 mm
- Circumference
- 2063.4 mm
- Revs / km
- 484.6 rev/km
Comparison Result
- Width
- +10 mm (+4.65%)
- Sidewall
- -5.75 mm (-4.86%)
- Diameter
- -11.50 mm (-1.72%)
- Circumference
- -36.1 mm (-1.72%)
- Revs / km
- +8.3 rev/km (+1.75%)
- Ground Clearance
- -5.75 mm
- Speedometer Error
- -1.72%
Current / New
Current (668.30 mm)New (656.80mm)
Speed Table
| Indicated speed (km/h) | 20 | 40 | 60 | 80 | 100 | 120 | 140 |
|---|---|---|---|---|---|---|---|
| Actual speed (km/h) | 19.66 | 39.31 | 58.97 | 78.62 | 98.28 | 117.94 | 137.59 |
| Deviation | -0.34 | -0.69 | -1.03 | -1.38 | -1.72 | -2.06 | -2.41 |
Safety recommendation
Safe to use
The diameter difference is within ±3% — safe for speedometer accuracy and ABS/traction control calibration.
Note
- Changing tire size may affect speedometer accuracy.
- A wider tire may affect grip, fuel economy, and ride feel.
- Please check compatibility with your wheels and vehicle before installing.
All Tools
Tire Size Calculator
Calculate and compare tire sizes
Plus / Minus Sizing
Find a matching size for a new wheel diameter
Wheel Fitment
Calculate offset and wheel position
Unit & Tire Converter
Convert units and tire sizes
Comparison & Reports
Compare multiple sizes and generate a report
Speedometer Error
Calculate speed reading deviation