Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 29.5/10.5-15 | 285/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.51 (749.46) | 25.85 (656.7) | -3.65 (-92.76) -12.4% |
| Width inches (mm) | 10.51 (267) | 11.22 (285) | 0.71 (18) 6.7% |
| Circum. inches (mm) | 92.7 (2354.5) | 81.22 (2063.08) | -11.47 (-291.41) -12.4% |
| Sidewall Height inches (mm) | 7.25 (184.23) | 3.93 (99.75) | -3.33 (-84.48) -45.9% |
| Revolutions per mile (km) | 683.52 (424.72) | 780.07 (484.71) | 96.55 (59.99) 14.1% |
285/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.52 mph (28.2 km/h) |
| 25 mph (40.23 km/h) | 21.91 mph (35.25 km/h) |
| 30 mph (48.28 km/h) | 26.29 mph (42.3 km/h) |
| 35 mph (56.33 km/h) | 30.67 mph (49.36 km/h) |
| 40 mph (64.37 km/h) | 35.05 mph (56.41 km/h) |
| 45 mph (72.42 km/h) | 39.43 mph (63.46 km/h) |
| 50 mph (80.47 km/h) | 43.81 mph (70.51 km/h) |
| 55 mph (88.51 km/h) | 48.19 mph (77.56 km/h) |
| 60 mph (96.56 km/h) | 52.57 mph (84.61 km/h) |
| 65 mph (104.61 km/h) | 56.96 mph (91.66 km/h) |
| 70 mph (112.65 km/h) | 61.34 mph (98.71 km/h) |
| 75 mph (120.7 km/h) | 65.72 mph (105.76 km/h) |
| 80 mph (128.75 km/h) | 70.1 mph (112.81 km/h) |
| 85 mph (136.79 km/h) | 74.48 mph (119.86 km/h) |
| 90 mph (144.84 km/h) | 78.86 mph (126.91 km/h) |
| 95 mph (152.89 km/h) | 83.24 mph (133.97 km/h) |
| 100 mph (160.93 km/h) | 87.62 mph (141.02 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 |
Better Fuel Economy Factory Ratios Increased Power
