Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-21 | 355/25-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.73 (704.4) | 28.99 (736.3) | 1.26 (31.9) 4.5% |
| Width inches (mm) | 11.22 (285) | 13.98 (355) | 2.76 (70) 24.6% |
| Circum. inches (mm) | 87.12 (2212.94) | 91.07 (2313.15) | 3.95 (100.22) 4.5% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 3.49 (88.75) | 0.13 (3.25) 3.8% |
| Revolutions per mile (km) | 727.24 (451.89) | 695.74 (432.31) | -31.51 (-19.58) -4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.91 mph (33.64 km/h) |
| 25 mph (40.23 km/h) | 26.13 mph (42.06 km/h) |
| 30 mph (48.28 km/h) | 31.36 mph (50.47 km/h) |
| 35 mph (56.33 km/h) | 36.59 mph (58.88 km/h) |
| 40 mph (64.37 km/h) | 41.81 mph (67.29 km/h) |
| 45 mph (72.42 km/h) | 47.04 mph (75.7 km/h) |
| 50 mph (80.47 km/h) | 52.26 mph (84.11 km/h) |
| 55 mph (88.51 km/h) | 57.49 mph (92.52 km/h) |
| 60 mph (96.56 km/h) | 62.72 mph (100.93 km/h) |
| 65 mph (104.61 km/h) | 67.94 mph (109.34 km/h) |
| 70 mph (112.65 km/h) | 73.17 mph (117.76 km/h) |
| 75 mph (120.7 km/h) | 78.4 mph (126.17 km/h) |
| 80 mph (128.75 km/h) | 83.62 mph (134.58 km/h) |
| 85 mph (136.79 km/h) | 88.85 mph (142.99 km/h) |
| 90 mph (144.84 km/h) | 94.08 mph (151.4 km/h) |
| 95 mph (152.89 km/h) | 99.3 mph (159.81 km/h) |
| 100 mph (160.93 km/h) | 104.53 mph (168.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1771 | 2057 | 2215 | 2313 | 2418 | 2494 | 2577 | 2675 | 2810 | 2946 | 3097 | 3217 | 3436 | 3677 | 3865 | 3986 | 4053 | 4302 | 4649 | 5402 |
Better Fuel Economy Factory Ratios Increased Power
