Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 26.86 (682.2) | 1.35 (34.4) 5.3% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 80.12 (2035.12) | 84.38 (2143.19) | 4.25 (108.07) 5.3% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.43 (112.5) | 0.18 (4.5) 4.2% |
| Revolutions per mile (km) | 790.78 (491.37) | 750.91 (466.59) | -39.88 (-24.78) -5% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.06 mph (33.9 km/h) |
| 25 mph (40.23 km/h) | 26.33 mph (42.37 km/h) |
| 30 mph (48.28 km/h) | 31.59 mph (50.84 km/h) |
| 35 mph (56.33 km/h) | 36.86 mph (59.32 km/h) |
| 40 mph (64.37 km/h) | 42.12 mph (67.79 km/h) |
| 45 mph (72.42 km/h) | 47.39 mph (76.27 km/h) |
| 50 mph (80.47 km/h) | 52.66 mph (84.74 km/h) |
| 55 mph (88.51 km/h) | 57.92 mph (93.21 km/h) |
| 60 mph (96.56 km/h) | 63.19 mph (101.69 km/h) |
| 65 mph (104.61 km/h) | 68.45 mph (110.16 km/h) |
| 70 mph (112.65 km/h) | 73.72 mph (118.64 km/h) |
| 75 mph (120.7 km/h) | 78.98 mph (127.11 km/h) |
| 80 mph (128.75 km/h) | 84.25 mph (135.58 km/h) |
| 85 mph (136.79 km/h) | 89.51 mph (144.06 km/h) |
| 90 mph (144.84 km/h) | 94.78 mph (152.53 km/h) |
| 95 mph (152.89 km/h) | 100.04 mph (161.01 km/h) |
| 100 mph (160.93 km/h) | 105.31 mph (169.48 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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