Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/50-20 | 245/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.43 (773) | 28.68 (728.5) | -1.75 (-44.5) -5.8% |
| Width inches (mm) | 10.43 (265) | 9.65 (245) | -0.79 (-20) -7.5% |
| Circum. inches (mm) | 95.61 (2428.45) | 90.1 (2288.65) | -5.5 (-139.8) -5.8% |
| Sidewall Height inches (mm) | 5.22 (132.5) | 4.34 (110.25) | -0.88 (-22.25) -16.8% |
| Revolutions per mile (km) | 662.7 (411.78) | 703.18 (436.94) | 40.48 (25.15) 6.1% |
245/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.85 mph (30.33 km/h) |
| 25 mph (40.23 km/h) | 23.56 mph (37.92 km/h) |
| 30 mph (48.28 km/h) | 28.27 mph (45.5 km/h) |
| 35 mph (56.33 km/h) | 32.99 mph (53.08 km/h) |
| 40 mph (64.37 km/h) | 37.7 mph (60.67 km/h) |
| 45 mph (72.42 km/h) | 42.41 mph (68.25 km/h) |
| 50 mph (80.47 km/h) | 47.12 mph (75.84 km/h) |
| 55 mph (88.51 km/h) | 51.83 mph (83.42 km/h) |
| 60 mph (96.56 km/h) | 56.55 mph (91 km/h) |
| 65 mph (104.61 km/h) | 61.26 mph (98.59 km/h) |
| 70 mph (112.65 km/h) | 65.97 mph (106.17 km/h) |
| 75 mph (120.7 km/h) | 70.68 mph (113.75 km/h) |
| 80 mph (128.75 km/h) | 75.39 mph (121.34 km/h) |
| 85 mph (136.79 km/h) | 80.11 mph (128.92 km/h) |
| 90 mph (144.84 km/h) | 84.82 mph (136.5 km/h) |
| 95 mph (152.89 km/h) | 89.53 mph (144.09 km/h) |
| 100 mph (160.93 km/h) | 94.24 mph (151.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1789 | 2079 | 2239 | 2338 | 2444 | 2520 | 2604 | 2703 | 2840 | 2977 | 3130 | 3252 | 3472 | 3716 | 3906 | 4028 | 4097 | 4348 | 4698 | 5460 |
Better Fuel Economy Factory Ratios Increased Power
