Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 285/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 25.85 (656.7) | 2.3 (58.5) 9.8% |
| Width inches (mm) | 9.25 (235) | 11.22 (285) | 1.97 (50) 21.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 81.22 (2063.08) | 7.24 (183.78) 9.8% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 3.93 (99.75) | 1.15 (29.25) 41.5% |
| Revolutions per mile (km) | 856.35 (532.11) | 780.07 (484.71) | -76.29 (-47.4) -8.9% |
285/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.96 mph (35.33 km/h) |
| 25 mph (40.23 km/h) | 27.44 mph (44.17 km/h) |
| 30 mph (48.28 km/h) | 32.93 mph (53 km/h) |
| 35 mph (56.33 km/h) | 38.42 mph (61.84 km/h) |
| 40 mph (64.37 km/h) | 43.91 mph (70.67 km/h) |
| 45 mph (72.42 km/h) | 49.4 mph (79.5 km/h) |
| 50 mph (80.47 km/h) | 54.89 mph (88.34 km/h) |
| 55 mph (88.51 km/h) | 60.38 mph (97.17 km/h) |
| 60 mph (96.56 km/h) | 65.87 mph (106 km/h) |
| 65 mph (104.61 km/h) | 71.36 mph (114.84 km/h) |
| 70 mph (112.65 km/h) | 76.85 mph (123.67 km/h) |
| 75 mph (120.7 km/h) | 82.33 mph (132.5 km/h) |
| 80 mph (128.75 km/h) | 87.82 mph (141.34 km/h) |
| 85 mph (136.79 km/h) | 93.31 mph (150.17 km/h) |
| 90 mph (144.84 km/h) | 98.8 mph (159.01 km/h) |
| 95 mph (152.89 km/h) | 104.29 mph (167.84 km/h) |
| 100 mph (160.93 km/h) | 109.78 mph (176.67 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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