Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 26.86 (682.2) | 1.42 (36) 5.6% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 79.93 (2030.1) | 84.38 (2143.19) | 4.45 (113.1) 5.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.43 (112.5) | 0.71 (18) 19% |
| Revolutions per mile (km) | 792.74 (492.59) | 750.91 (466.59) | -41.83 (-25.99) -5.3% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.11 mph (33.98 km/h) |
| 25 mph (40.23 km/h) | 26.39 mph (42.48 km/h) |
| 30 mph (48.28 km/h) | 31.67 mph (50.97 km/h) |
| 35 mph (56.33 km/h) | 36.95 mph (59.47 km/h) |
| 40 mph (64.37 km/h) | 42.23 mph (67.96 km/h) |
| 45 mph (72.42 km/h) | 47.51 mph (76.46 km/h) |
| 50 mph (80.47 km/h) | 52.79 mph (84.95 km/h) |
| 55 mph (88.51 km/h) | 58.06 mph (93.45 km/h) |
| 60 mph (96.56 km/h) | 63.34 mph (101.94 km/h) |
| 65 mph (104.61 km/h) | 68.62 mph (110.44 km/h) |
| 70 mph (112.65 km/h) | 73.9 mph (118.93 km/h) |
| 75 mph (120.7 km/h) | 79.18 mph (127.43 km/h) |
| 80 mph (128.75 km/h) | 84.46 mph (135.92 km/h) |
| 85 mph (136.79 km/h) | 89.74 mph (144.42 km/h) |
| 90 mph (144.84 km/h) | 95.01 mph (152.91 km/h) |
| 95 mph (152.89 km/h) | 100.29 mph (161.41 km/h) |
| 100 mph (160.93 km/h) | 105.57 mph (169.9 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2220 | 2391 | 2496 | 2610 | 2692 | 2781 | 2887 | 3033 | 3179 | 3342 | 3472 | 3708 | 3968 | 4171 | 4302 | 4375 | 4643 | 5017 | 5830 |
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