Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-21 | 285/46-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.4) | 31.32 (795.6) | 0.28 (7.2) 0.9% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 97.51 (2476.83) | 98.4 (2499.45) | 0.89 (22.62) 0.9% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 5.16 (131.1) | 0.14 (3.6) 2.8% |
| Revolutions per mile (km) | 649.76 (403.74) | 643.88 (400.09) | -5.88 (-3.65) -0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.6 km/h) |
| 30 mph (48.28 km/h) | 30.27 mph (48.72 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.84 km/h) |
| 40 mph (64.37 km/h) | 40.37 mph (64.96 km/h) |
| 45 mph (72.42 km/h) | 45.41 mph (73.08 km/h) |
| 50 mph (80.47 km/h) | 50.46 mph (81.2 km/h) |
| 55 mph (88.51 km/h) | 55.5 mph (89.32 km/h) |
| 60 mph (96.56 km/h) | 60.55 mph (97.44 km/h) |
| 65 mph (104.61 km/h) | 65.59 mph (105.56 km/h) |
| 70 mph (112.65 km/h) | 70.64 mph (113.68 km/h) |
| 75 mph (120.7 km/h) | 75.68 mph (121.8 km/h) |
| 80 mph (128.75 km/h) | 80.73 mph (129.92 km/h) |
| 85 mph (136.79 km/h) | 85.78 mph (138.04 km/h) |
| 90 mph (144.84 km/h) | 90.82 mph (146.16 km/h) |
| 95 mph (152.89 km/h) | 95.87 mph (154.28 km/h) |
| 100 mph (160.93 km/h) | 100.91 mph (162.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1639 | 1904 | 2050 | 2141 | 2238 | 2308 | 2385 | 2475 | 2601 | 2726 | 2866 | 2977 | 3179 | 3403 | 3577 | 3688 | 3751 | 3981 | 4302 | 4999 |
Better Fuel Economy Factory Ratios Increased Power
