Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 245/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 28.68 (728.5) | -0.96 (-24.5) -3.3% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 93.13 (2365.62) | 90.1 (2288.65) | -3.03 (-76.97) -3.3% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.34 (110.25) | -0.48 (-12.25) -10% |
| Revolutions per mile (km) | 680.31 (422.72) | 703.18 (436.94) | 22.88 (14.22) 3.4% |
245/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.35 mph (31.14 km/h) |
| 25 mph (40.23 km/h) | 24.19 mph (38.92 km/h) |
| 30 mph (48.28 km/h) | 29.02 mph (46.71 km/h) |
| 35 mph (56.33 km/h) | 33.86 mph (54.49 km/h) |
| 40 mph (64.37 km/h) | 38.7 mph (62.28 km/h) |
| 45 mph (72.42 km/h) | 43.54 mph (70.06 km/h) |
| 50 mph (80.47 km/h) | 48.37 mph (77.85 km/h) |
| 55 mph (88.51 km/h) | 53.21 mph (85.63 km/h) |
| 60 mph (96.56 km/h) | 58.05 mph (93.42 km/h) |
| 65 mph (104.61 km/h) | 62.89 mph (101.2 km/h) |
| 70 mph (112.65 km/h) | 67.72 mph (108.99 km/h) |
| 75 mph (120.7 km/h) | 72.56 mph (116.77 km/h) |
| 80 mph (128.75 km/h) | 77.4 mph (124.56 km/h) |
| 85 mph (136.79 km/h) | 82.23 mph (132.34 km/h) |
| 90 mph (144.84 km/h) | 87.07 mph (140.13 km/h) |
| 95 mph (152.89 km/h) | 91.91 mph (147.91 km/h) |
| 100 mph (160.93 km/h) | 96.75 mph (155.7 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
