Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-21 | 285/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.97 (710.4) | 28.85 (732.9) | 0.89 (22.5) 3.2% |
| Width inches (mm) | 11.61 (295) | 11.22 (285) | -0.39 (-10) -3.4% |
| Circum. inches (mm) | 87.87 (2231.79) | 90.65 (2302.47) | 2.78 (70.69) 3.2% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 3.93 (99.75) | 0.44 (11.25) 12.7% |
| Revolutions per mile (km) | 721.1 (448.07) | 698.96 (434.31) | -22.14 (-13.76) -3.1% |
285/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.63 mph (33.21 km/h) |
| 25 mph (40.23 km/h) | 25.79 mph (41.51 km/h) |
| 30 mph (48.28 km/h) | 30.95 mph (49.81 km/h) |
| 35 mph (56.33 km/h) | 36.11 mph (58.11 km/h) |
| 40 mph (64.37 km/h) | 41.27 mph (66.41 km/h) |
| 45 mph (72.42 km/h) | 46.43 mph (74.71 km/h) |
| 50 mph (80.47 km/h) | 51.58 mph (83.02 km/h) |
| 55 mph (88.51 km/h) | 56.74 mph (91.32 km/h) |
| 60 mph (96.56 km/h) | 61.9 mph (99.62 km/h) |
| 65 mph (104.61 km/h) | 67.06 mph (107.92 km/h) |
| 70 mph (112.65 km/h) | 72.22 mph (116.22 km/h) |
| 75 mph (120.7 km/h) | 77.38 mph (124.52 km/h) |
| 80 mph (128.75 km/h) | 82.53 mph (132.83 km/h) |
| 85 mph (136.79 km/h) | 87.69 mph (141.13 km/h) |
| 90 mph (144.84 km/h) | 92.85 mph (149.43 km/h) |
| 95 mph (152.89 km/h) | 98.01 mph (157.73 km/h) |
| 100 mph (160.93 km/h) | 103.17 mph (166.03 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
