Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-17 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.86 (656.8) | 28.18 (715.7) | 2.32 (58.9) 9% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 81.24 (2063.4) | 88.52 (2248.44) | 7.29 (185.04) 9% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 5.09 (129.25) | 0.66 (16.75) 14.9% |
| Revolutions per mile (km) | 779.95 (484.64) | 715.76 (444.75) | -64.19 (-39.88) -8.2% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.79 mph (35.07 km/h) |
| 25 mph (40.23 km/h) | 27.24 mph (43.84 km/h) |
| 30 mph (48.28 km/h) | 32.69 mph (52.61 km/h) |
| 35 mph (56.33 km/h) | 38.14 mph (61.38 km/h) |
| 40 mph (64.37 km/h) | 43.59 mph (70.15 km/h) |
| 45 mph (72.42 km/h) | 49.04 mph (78.92 km/h) |
| 50 mph (80.47 km/h) | 54.48 mph (87.68 km/h) |
| 55 mph (88.51 km/h) | 59.93 mph (96.45 km/h) |
| 60 mph (96.56 km/h) | 65.38 mph (105.22 km/h) |
| 65 mph (104.61 km/h) | 70.83 mph (113.99 km/h) |
| 70 mph (112.65 km/h) | 76.28 mph (122.76 km/h) |
| 75 mph (120.7 km/h) | 81.73 mph (131.53 km/h) |
| 80 mph (128.75 km/h) | 87.17 mph (140.29 km/h) |
| 85 mph (136.79 km/h) | 92.62 mph (149.06 km/h) |
| 90 mph (144.84 km/h) | 98.07 mph (157.83 km/h) |
| 95 mph (152.89 km/h) | 103.52 mph (166.6 km/h) |
| 100 mph (160.93 km/h) | 108.97 mph (175.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2116 | 2279 | 2380 | 2488 | 2566 | 2651 | 2752 | 2891 | 3031 | 3186 | 3310 | 3534 | 3782 | 3976 | 4100 | 4170 | 4426 | 4782 | 5557 |
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