Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-21 | 285/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.73 (704.4) | 28.85 (732.9) | 1.12 (28.5) 4% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 87.12 (2212.94) | 90.65 (2302.47) | 3.53 (89.54) 4% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 3.93 (99.75) | 0.56 (14.25) 16.7% |
| Revolutions per mile (km) | 727.24 (451.89) | 698.96 (434.31) | -28.28 (-17.57) -3.9% |
285/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.81 mph (33.49 km/h) |
| 25 mph (40.23 km/h) | 26.01 mph (41.86 km/h) |
| 30 mph (48.28 km/h) | 31.21 mph (50.23 km/h) |
| 35 mph (56.33 km/h) | 36.42 mph (58.61 km/h) |
| 40 mph (64.37 km/h) | 41.62 mph (66.98 km/h) |
| 45 mph (72.42 km/h) | 46.82 mph (75.35 km/h) |
| 50 mph (80.47 km/h) | 52.02 mph (83.72 km/h) |
| 55 mph (88.51 km/h) | 57.23 mph (92.1 km/h) |
| 60 mph (96.56 km/h) | 62.43 mph (100.47 km/h) |
| 65 mph (104.61 km/h) | 67.63 mph (108.84 km/h) |
| 70 mph (112.65 km/h) | 72.83 mph (117.21 km/h) |
| 75 mph (120.7 km/h) | 78.03 mph (125.58 km/h) |
| 80 mph (128.75 km/h) | 83.24 mph (133.96 km/h) |
| 85 mph (136.79 km/h) | 88.44 mph (142.33 km/h) |
| 90 mph (144.84 km/h) | 93.64 mph (150.7 km/h) |
| 95 mph (152.89 km/h) | 98.84 mph (159.07 km/h) |
| 100 mph (160.93 km/h) | 104.05 mph (167.45 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
