Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 285/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 25.85 (656.7) | 0.44 (11.2) 1.7% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 79.84 (2027.9) | 81.22 (2063.08) | 1.39 (35.19) 1.7% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 3.93 (99.75) | 1.22 (31) 45.1% |
| Revolutions per mile (km) | 793.6 (493.12) | 780.07 (484.71) | -13.53 (-8.41) -1.7% |
285/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.35 mph (32.75 km/h) |
| 25 mph (40.23 km/h) | 25.43 mph (40.93 km/h) |
| 30 mph (48.28 km/h) | 30.52 mph (49.12 km/h) |
| 35 mph (56.33 km/h) | 35.61 mph (57.3 km/h) |
| 40 mph (64.37 km/h) | 40.69 mph (65.49 km/h) |
| 45 mph (72.42 km/h) | 45.78 mph (73.68 km/h) |
| 50 mph (80.47 km/h) | 50.87 mph (81.86 km/h) |
| 55 mph (88.51 km/h) | 55.95 mph (90.05 km/h) |
| 60 mph (96.56 km/h) | 61.04 mph (98.24 km/h) |
| 65 mph (104.61 km/h) | 66.13 mph (106.42 km/h) |
| 70 mph (112.65 km/h) | 71.21 mph (114.61 km/h) |
| 75 mph (120.7 km/h) | 76.3 mph (122.8 km/h) |
| 80 mph (128.75 km/h) | 81.39 mph (130.98 km/h) |
| 85 mph (136.79 km/h) | 86.47 mph (139.17 km/h) |
| 90 mph (144.84 km/h) | 91.56 mph (147.35 km/h) |
| 95 mph (152.89 km/h) | 96.65 mph (155.54 km/h) |
| 100 mph (160.93 km/h) | 101.74 mph (163.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | 2306 | 2484 | 2593 | 2712 | 2796 | 2889 | 2999 | 3151 | 3303 | 3472 | 3607 | 3852 | 4122 | 4333 | 4469 | 4545 | 4823 | 5212 | 6057 |
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