Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-22 | 255/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.1 (815.3) | 29.04 (737.5) | -3.06 (-77.8) -9.5% |
| Width inches (mm) | 11.22 (285) | 10.04 (255) | -1.18 (-30) -10.5% |
| Circum. inches (mm) | 100.84 (2561.34) | 91.22 (2316.92) | -9.62 (-244.42) -9.5% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 4.52 (114.75) | -0.53 (-13.5) -10.5% |
| Revolutions per mile (km) | 628.32 (390.42) | 694.6 (431.61) | 66.28 (41.19) 10.5% |
255/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.09 mph (29.12 km/h) |
| 25 mph (40.23 km/h) | 22.61 mph (36.39 km/h) |
| 30 mph (48.28 km/h) | 27.14 mph (43.67 km/h) |
| 35 mph (56.33 km/h) | 31.66 mph (50.95 km/h) |
| 40 mph (64.37 km/h) | 36.18 mph (58.23 km/h) |
| 45 mph (72.42 km/h) | 40.71 mph (65.51 km/h) |
| 50 mph (80.47 km/h) | 45.23 mph (72.79 km/h) |
| 55 mph (88.51 km/h) | 49.75 mph (80.07 km/h) |
| 60 mph (96.56 km/h) | 54.27 mph (87.35 km/h) |
| 65 mph (104.61 km/h) | 58.8 mph (94.63 km/h) |
| 70 mph (112.65 km/h) | 63.32 mph (101.9 km/h) |
| 75 mph (120.7 km/h) | 67.84 mph (109.18 km/h) |
| 80 mph (128.75 km/h) | 72.37 mph (116.46 km/h) |
| 85 mph (136.79 km/h) | 76.89 mph (123.74 km/h) |
| 90 mph (144.84 km/h) | 81.41 mph (131.02 km/h) |
| 95 mph (152.89 km/h) | 85.93 mph (138.3 km/h) |
| 100 mph (160.93 km/h) | 90.46 mph (145.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1768 | 2053 | 2211 | 2309 | 2415 | 2490 | 2572 | 2670 | 2806 | 2941 | 3091 | 3212 | 3430 | 3671 | 3859 | 3979 | 4047 | 4295 | 4641 | 5393 |
Better Fuel Economy Factory Ratios Increased Power
