Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/50-20 | 265/45-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.43 (773) | 30.39 (771.9) | -0.04 (-1.1) -0.1% |
| Width inches (mm) | 10.43 (265) | 10.43 (265) | 0 (0) 0% |
| Circum. inches (mm) | 95.61 (2428.45) | 95.47 (2425) | -0.14 (-3.46) -0.1% |
| Sidewall Height inches (mm) | 5.22 (132.5) | 4.69 (119.25) | -0.52 (-13.25) -10% |
| Revolutions per mile (km) | 662.7 (411.78) | 663.65 (412.37) | 0.94 (0.59) 0.1% |
265/45-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.14 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.18 km/h) |
| 30 mph (48.28 km/h) | 29.96 mph (48.21 km/h) |
| 35 mph (56.33 km/h) | 34.95 mph (56.25 km/h) |
| 40 mph (64.37 km/h) | 39.94 mph (64.28 km/h) |
| 45 mph (72.42 km/h) | 44.94 mph (72.32 km/h) |
| 50 mph (80.47 km/h) | 49.93 mph (80.35 km/h) |
| 55 mph (88.51 km/h) | 54.92 mph (88.39 km/h) |
| 60 mph (96.56 km/h) | 59.91 mph (96.42 km/h) |
| 65 mph (104.61 km/h) | 64.91 mph (104.46 km/h) |
| 70 mph (112.65 km/h) | 69.9 mph (112.49 km/h) |
| 75 mph (120.7 km/h) | 74.89 mph (120.53 km/h) |
| 80 mph (128.75 km/h) | 79.89 mph (128.56 km/h) |
| 85 mph (136.79 km/h) | 84.88 mph (136.6 km/h) |
| 90 mph (144.84 km/h) | 89.87 mph (144.64 km/h) |
| 95 mph (152.89 km/h) | 94.86 mph (152.67 km/h) |
| 100 mph (160.93 km/h) | 99.86 mph (160.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1689 | 1962 | 2113 | 2206 | 2307 | 2379 | 2458 | 2551 | 2681 | 2810 | 2954 | 3069 | 3277 | 3507 | 3687 | 3802 | 3866 | 4104 | 4434 | 5153 |
Better Fuel Economy Factory Ratios Increased Power
