215/60R16 vs 225/60R16
Diameter +1.81% · Speedo at 60 mph reads 61.1 mph actual · Ground clearance +6.0 mm
Generally safe — within the 3% tolerance
The diameter difference is ≤3%, which is the widely-accepted fitment tolerance for speedometer accuracy and ABS/traction-control calibration. Verify clearance and load rating with a tire professional before installing.
Speedometer effect
When the vehicle's speedometer (calibrated to 215/60R16) reads 60 mph, the actual speed with 225/60R16 mounted is:
Speedometer error: +1.80% · Odometer reads high by 1.80%
Full comparison
| Measurement | 215/60R16 | 225/60R16 | Delta |
|---|---|---|---|
| Overall diameter | 26.16" | 26.63" | +1.81% |
| Section width | 215 mm | 225 mm | +10 mm |
| Sidewall height | 129 mm | 135 mm | +6.00 mm |
| Rim diameter | 16" | 16" | +0" |
| Circumference | 2087 mm | 2125 mm | +38 mm |
| Revs / mile | 771 | 757 | -14 |
| Ground clearance change | +6.0 mm | ||
Questions about this swap
What is the diameter difference between 215/60R16 and 225/60R16?
225/60R16 is 1.81% larger in overall diameter than 215/60R16 — a difference of 12.0 mm (0.47 inches).
How does 225/60R16 affect the speedometer if the car was calibrated for 215/60R16?
When the speedometer reads 60 mph (calibrated for 215/60R16), the actual speed with 225/60R16 is 61.1 mph — an error of +1.80%.
Is it safe to replace 215/60R16 with 225/60R16?
Generally safe — within the 3% tolerance. The diameter difference is ≤3%, which is the widely-accepted fitment tolerance for speedometer accuracy and ABS/traction-control calibration. Verify clearance and load rating with a tire professional before installing.
All calculations use standard ETRTO formulas. Confirm fitment with a qualified tire professional and your vehicle's door-placard before purchasing.