Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/35-21 | 255/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.85 (732.9) | 28.03 (711.9) | -0.83 (-21) -2.9% |
| Width inches (mm) | 11.22 (285) | 10.04 (255) | -1.18 (-30) -10.5% |
| Circum. inches (mm) | 90.65 (2302.47) | 88.05 (2236.5) | -2.6 (-65.97) -2.9% |
| Sidewall Height inches (mm) | 3.93 (99.75) | 3.51 (89.25) | -0.41 (-10.5) -10.5% |
| Revolutions per mile (km) | 698.96 (434.31) | 719.58 (447.13) | 20.62 (12.81) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.26 km/h) |
| 25 mph (40.23 km/h) | 24.28 mph (39.08 km/h) |
| 30 mph (48.28 km/h) | 29.14 mph (46.9 km/h) |
| 35 mph (56.33 km/h) | 34 mph (54.71 km/h) |
| 40 mph (64.37 km/h) | 38.85 mph (62.53 km/h) |
| 45 mph (72.42 km/h) | 43.71 mph (70.35 km/h) |
| 50 mph (80.47 km/h) | 48.57 mph (78.16 km/h) |
| 55 mph (88.51 km/h) | 53.42 mph (85.98 km/h) |
| 60 mph (96.56 km/h) | 58.28 mph (93.79 km/h) |
| 65 mph (104.61 km/h) | 63.14 mph (101.61 km/h) |
| 70 mph (112.65 km/h) | 67.99 mph (109.43 km/h) |
| 75 mph (120.7 km/h) | 72.85 mph (117.24 km/h) |
| 80 mph (128.75 km/h) | 77.71 mph (125.06 km/h) |
| 85 mph (136.79 km/h) | 82.56 mph (132.87 km/h) |
| 90 mph (144.84 km/h) | 87.42 mph (140.69 km/h) |
| 95 mph (152.89 km/h) | 92.28 mph (148.51 km/h) |
| 100 mph (160.93 km/h) | 97.13 mph (156.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1831 | 2127 | 2291 | 2392 | 2501 | 2579 | 2665 | 2766 | 2907 | 3047 | 3203 | 3327 | 3553 | 3803 | 3997 | 4122 | 4192 | 4449 | 4808 | 5587 |
Better Fuel Economy Factory Ratios Increased Power
