215/65R16 vs 225/65R16 tire size
A 225/65R16 is 0.51 inches (13 mm) taller and 0.39 inches (10 mm) wider than a 215/65R16. Fit them in place of 215/65R16 tires and the speedometer reads low: at 60 mph on it you’re doing 61.1 mph, 1.9% faster, and the vehicle sits 0.26 inches (7 mm) higher.
Sources checked
| Dimension | 215/65R16 | 225/65R16 | Change |
|---|---|---|---|
| Overall diameter | 27.00 in (686 mm) | 27.52 in (699 mm) | +0.52 in (+13 mm) |
| Section width | 8.46 in (215 mm) | 8.86 in (225 mm) | +0.40 in (+10 mm) |
| Sidewall height | 5.50 in (140 mm) | 5.76 in (146 mm) | +0.26 in (+6 mm) |
| Aspect ratio | 65% | 65% | |
| Rim diameter | 16 in | 16 in | |
| Circumference | 84.8 in (2,155 mm) | 86.4 in (2,196 mm) | +1.6 in |
| Revolutions per mile | 747 | 733 | −14 |
| Revolutions per km | 464 | 455 | −9 |
Check another speed or size
Metric, LT and flotation
At 60 mph on the speedometer you’re doing
61.1mph
+1.9% · the speedometer reads low
- Height
- +0.51 in (+13 mm)
- Width
- +0.39 in (+10 mm)
- Ground clearance
- +0.26 in (+7 mm)
- Each side, same wheel
- +0.20 in (+5 mm)
215/65R16 and 225/65R16 side by side
| Dimension | 215/65R16 | 225/65R16 | Change |
|---|---|---|---|
| Overall diameter | 27.00 in (686 mm) | 27.52 in (699 mm) | +0.52 in (+13 mm) |
| Section width | 8.46 in (215 mm) | 8.86 in (225 mm) | +0.40 in (+10 mm) |
| Sidewall height | 5.50 in (140 mm) | 5.76 in (146 mm) | +0.26 in (+6 mm) |
| Aspect ratio | 65% | 65% | |
| Rim diameter | 16 in | 16 in | |
| Circumference | 84.8 in | 86.4 in | +1.6 in |
| Revolutions per mile | 747 | 733 | −14 |
| Revolutions per km | 464 | 455 | −9 |
The working
- 215/65R16: sidewall = 215 mm × 65% = 139.8 mm = 5.50 in.
- Diameter = rim + 2 × sidewall = 16 + 2 × 5.50 = 27.00 in (686 mm).
- Circumference = π × 27.00 = 84.8 in; revolutions per mile = 63,360 ÷ 84.8 = 747.
- 225/65R16: sidewall = 225 mm × 65% = 146.3 mm = 5.76 in.
- Diameter = rim + 2 × sidewall = 16 + 2 × 5.76 = 27.52 in (699 mm).
- Circumference = π × 27.52 = 86.4 in; revolutions per mile = 63,360 ÷ 86.4 = 733.
- Speedometer. True speed = what it shows × new diameter ÷ old = 60 × 27.52 ÷ 27.00 = 61.1 mph.
- Ground clearance. Half the change in diameter: (27.52 − 27.00) ÷ 2 = +0.26 in.
Speedometer
A 225/65R16 turns 733 times a mile against the 215/65R16’s 747. With a speedometer set for 215/65R16, true speed is what it shows × 27.52 ÷ 27.00:
| Speedometer shows | True speed | Difference |
|---|---|---|
| 25 mph | 25.5 mph | +0.5 mph |
| 35 mph | 35.7 mph | +0.7 mph |
| 45 mph | 45.9 mph | +0.9 mph |
| 55 mph | 56.0 mph | +1.0 mph |
| 65 mph | 66.2 mph | +1.2 mph |
| 75 mph | 76.4 mph | +1.4 mph |
Clearance
- Ground clearance: +0.26 in (+7 mm), half the change in diameter.
- Top of the tread: +0.26 in (+7 mm), so that much less room under the fender.
- Each side, on the same wheel: +0.20 in (+5 mm), toward the suspension inside and toward the fender lip outside.
A new wheel with a different width or offset moves the tire again. The sidewall goes from 5.50 to 5.76 inches.
What tire makers publish
Inflated on the maker’s measuring rim; the percentage is against the arithmetic.
| Tire | Size as printed | Diameter | Width | Revs per mile |
|---|---|---|---|---|
| Toyo Extensa A/S II | 215/65R16 | 27 in (0.0%) | 8.7 in | 769 |
| Toyo Open Country A/T III | 215/65R16 | 27 in (0.0%) | 8.7 in | 769 |
| Toyo Extensa A/S II | 225/65R16 | 27.5 in (−0.1%) | 9 in | 756 |
Each size on its own
- 215/65R16 tire size: 27.0 × 8.5 in
- 225/65R16 tire size: 27.5 × 8.9 in
Other comparisons
Questions
Can I fit 225/65R16 tires instead of 215/65R16?
They fit the same 16-inch wheels. A 225/65R16 is 0.51 inches (13 mm) taller and 0.39 inches (10 mm) wider than a 215/65R16, so check three things first: that your wheels are within the 225/65R16’s approved rim width range, which tire makers list for each size; that it clears the fenders and suspension at full lock and full travel; and that its load index meets what your door-jamb placard asks for.
How far off is the speedometer with 225/65R16 tires?
With a speedometer set for 215/65R16, the speedometer reads low: at 60 mph on it you’re doing 61.1 mph, 1.9% faster. The odometer is off the same way: over 1,000 miles driven it shows 981.4.
Does 225/65R16 change the ground clearance?
By +0.26 inches (+7 mm), half the change in diameter, at the axles and at the lowest point under them. On the same wheel, each sidewall sits 0.20 inches further out, inside and outside.
Sources
- Bridgestone Americas: Determining tire size: P-metric, Euro-metric, LT-metric, C-type and flotation sizes, and what each number means (checked October 28, 2026)
- Toyo Tires: Extensa A/S II sizes and specifications: inflated overall diameter and width, revolutions per mile (checked October 28, 2026)
- Toyo Tires: Proxes Sport A/S sizes and specifications: inflated overall diameter and width, revolutions per mile (checked October 28, 2026)
- Toyo Tires: Open Country A/T III sizes and specifications: P-metric, LT-metric and flotation sizes, with revolutions per mile (checked October 28, 2026)
- Nitto Tire: Trail Grappler M/T sizes and specs: inflated overall diameter and width, LT-metric and flotation sizes (checked October 28, 2026)
Spotted a number that doesn’t match your manual or a source? Tell us; corrections are logged on the sources page.