Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-13 | 255/20-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.97 (532.7) | 17.02 (432.2) | -3.96 (-100.5) -18.9% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 65.89 (1673.53) | 53.46 (1357.8) | -12.43 (-315.73) -18.9% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 2.01 (51) | -1.98 (-50.25) -49.6% |
| Revolutions per mile (km) | 961.65 (597.54) | 1185.26 (736.49) | 223.61 (138.95) 23.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.23 mph (26.11 km/h) |
| 25 mph (40.23 km/h) | 20.28 mph (32.64 km/h) |
| 30 mph (48.28 km/h) | 24.34 mph (39.17 km/h) |
| 35 mph (56.33 km/h) | 28.4 mph (45.7 km/h) |
| 40 mph (64.37 km/h) | 32.45 mph (52.23 km/h) |
| 45 mph (72.42 km/h) | 36.51 mph (58.76 km/h) |
| 50 mph (80.47 km/h) | 40.57 mph (65.29 km/h) |
| 55 mph (88.51 km/h) | 44.62 mph (71.81 km/h) |
| 60 mph (96.56 km/h) | 48.68 mph (78.34 km/h) |
| 65 mph (104.61 km/h) | 52.74 mph (84.87 km/h) |
| 70 mph (112.65 km/h) | 56.79 mph (91.4 km/h) |
| 75 mph (120.7 km/h) | 60.85 mph (97.93 km/h) |
| 80 mph (128.75 km/h) | 64.91 mph (104.46 km/h) |
| 85 mph (136.79 km/h) | 68.96 mph (110.99 km/h) |
| 90 mph (144.84 km/h) | 73.02 mph (117.52 km/h) |
| 95 mph (152.89 km/h) | 77.08 mph (124.04 km/h) |
| 100 mph (160.93 km/h) | 81.13 mph (130.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
