Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 28.18 (715.7) | 2.85 (72.5) 11.3% |
| Width inches (mm) | 6.1 (155) | 9.25 (235) | 3.15 (80) 51.6% |
| Circum. inches (mm) | 79.55 (2020.67) | 88.52 (2248.44) | 8.97 (227.77) 11.3% |
| Sidewall Height inches (mm) | 3.66 (93) | 5.09 (129.25) | 1.43 (36.25) 39% |
| Revolutions per mile (km) | 796.44 (494.88) | 715.76 (444.75) | -80.68 (-50.13) -10.1% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.25 mph (35.81 km/h) |
| 25 mph (40.23 km/h) | 27.82 mph (44.77 km/h) |
| 30 mph (48.28 km/h) | 33.38 mph (53.72 km/h) |
| 35 mph (56.33 km/h) | 38.95 mph (62.68 km/h) |
| 40 mph (64.37 km/h) | 44.51 mph (71.63 km/h) |
| 45 mph (72.42 km/h) | 50.07 mph (80.58 km/h) |
| 50 mph (80.47 km/h) | 55.64 mph (89.54 km/h) |
| 55 mph (88.51 km/h) | 61.2 mph (98.49 km/h) |
| 60 mph (96.56 km/h) | 66.76 mph (107.44 km/h) |
| 65 mph (104.61 km/h) | 72.33 mph (116.4 km/h) |
| 70 mph (112.65 km/h) | 77.89 mph (125.35 km/h) |
| 75 mph (120.7 km/h) | 83.45 mph (134.31 km/h) |
| 80 mph (128.75 km/h) | 89.02 mph (143.26 km/h) |
| 85 mph (136.79 km/h) | 94.58 mph (152.21 km/h) |
| 90 mph (144.84 km/h) | 100.14 mph (161.17 km/h) |
| 95 mph (152.89 km/h) | 105.71 mph (170.12 km/h) |
| 100 mph (160.93 km/h) | 111.27 mph (179.07 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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