Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-15 | 305/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.04 (610.5) | 25.81 (655.5) | 1.77 (45) 7.4% |
| Width inches (mm) | 10.04 (255) | 12.01 (305) | 1.97 (50) 19.6% |
| Circum. inches (mm) | 75.51 (1917.94) | 81.08 (2059.31) | 5.57 (141.37) 7.4% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 5.4 (137.25) | 0.89 (22.5) 19.6% |
| Revolutions per mile (km) | 839.1 (521.39) | 781.5 (485.6) | -57.6 (-35.79) -6.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.47 mph (34.56 km/h) |
| 25 mph (40.23 km/h) | 26.84 mph (43.2 km/h) |
| 30 mph (48.28 km/h) | 32.21 mph (51.84 km/h) |
| 35 mph (56.33 km/h) | 37.58 mph (60.48 km/h) |
| 40 mph (64.37 km/h) | 42.95 mph (69.12 km/h) |
| 45 mph (72.42 km/h) | 48.32 mph (77.76 km/h) |
| 50 mph (80.47 km/h) | 53.69 mph (86.4 km/h) |
| 55 mph (88.51 km/h) | 59.05 mph (95.04 km/h) |
| 60 mph (96.56 km/h) | 64.42 mph (103.68 km/h) |
| 65 mph (104.61 km/h) | 69.79 mph (112.32 km/h) |
| 70 mph (112.65 km/h) | 75.16 mph (120.96 km/h) |
| 75 mph (120.7 km/h) | 80.53 mph (129.6 km/h) |
| 80 mph (128.75 km/h) | 85.9 mph (138.24 km/h) |
| 85 mph (136.79 km/h) | 91.27 mph (146.88 km/h) |
| 90 mph (144.84 km/h) | 96.63 mph (155.52 km/h) |
| 95 mph (152.89 km/h) | 102 mph (164.16 km/h) |
| 100 mph (160.93 km/h) | 107.37 mph (172.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1989 | 2310 | 2488 | 2598 | 2717 | 2801 | 2894 | 3004 | 3157 | 3309 | 3478 | 3614 | 3859 | 4130 | 4341 | 4477 | 4553 | 4832 | 5222 | 6068 |
Better Fuel Economy Factory Ratios Increased Power
