Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/30-21 | 285/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.26 (692.4) | 28.85 (732.9) | 1.59 (40.5) 5.8% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 85.64 (2175.24) | 90.65 (2302.47) | 5.01 (127.23) 5.8% |
| Sidewall Height inches (mm) | 3.13 (79.5) | 3.93 (99.75) | 0.8 (20.25) 25.5% |
| Revolutions per mile (km) | 739.85 (459.72) | 698.96 (434.31) | -40.88 (-25.4) -5.5% |
285/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.07 km/h) |
| 25 mph (40.23 km/h) | 26.46 mph (42.59 km/h) |
| 30 mph (48.28 km/h) | 31.75 mph (51.1 km/h) |
| 35 mph (56.33 km/h) | 37.05 mph (59.62 km/h) |
| 40 mph (64.37 km/h) | 42.34 mph (68.14 km/h) |
| 45 mph (72.42 km/h) | 47.63 mph (76.66 km/h) |
| 50 mph (80.47 km/h) | 52.92 mph (85.17 km/h) |
| 55 mph (88.51 km/h) | 58.22 mph (93.69 km/h) |
| 60 mph (96.56 km/h) | 63.51 mph (102.21 km/h) |
| 65 mph (104.61 km/h) | 68.8 mph (110.73 km/h) |
| 70 mph (112.65 km/h) | 74.09 mph (119.24 km/h) |
| 75 mph (120.7 km/h) | 79.39 mph (127.76 km/h) |
| 80 mph (128.75 km/h) | 84.68 mph (136.28 km/h) |
| 85 mph (136.79 km/h) | 89.97 mph (144.8 km/h) |
| 90 mph (144.84 km/h) | 95.26 mph (153.31 km/h) |
| 95 mph (152.89 km/h) | 100.56 mph (161.83 km/h) |
| 100 mph (160.93 km/h) | 105.85 mph (170.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1779 | 2066 | 2225 | 2324 | 2430 | 2505 | 2589 | 2687 | 2823 | 2960 | 3111 | 3232 | 3451 | 3694 | 3883 | 4004 | 4072 | 4322 | 4670 | 5427 |
Better Fuel Economy Factory Ratios Increased Power
