Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-15 | 305/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.04 (610.5) | 27.01 (686) | 2.97 (75.5) 12.4% |
| Width inches (mm) | 10.04 (255) | 12.01 (305) | 1.97 (50) 19.6% |
| Circum. inches (mm) | 75.51 (1917.94) | 84.85 (2155.13) | 9.34 (237.19) 12.4% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 6 (152.5) | 1.49 (37.75) 32.9% |
| Revolutions per mile (km) | 839.1 (521.39) | 746.75 (464.01) | -92.35 (-57.38) -11% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.47 mph (36.17 km/h) |
| 25 mph (40.23 km/h) | 28.09 mph (45.21 km/h) |
| 30 mph (48.28 km/h) | 33.71 mph (54.25 km/h) |
| 35 mph (56.33 km/h) | 39.33 mph (63.29 km/h) |
| 40 mph (64.37 km/h) | 44.95 mph (72.33 km/h) |
| 45 mph (72.42 km/h) | 50.57 mph (81.38 km/h) |
| 50 mph (80.47 km/h) | 56.18 mph (90.42 km/h) |
| 55 mph (88.51 km/h) | 61.8 mph (99.46 km/h) |
| 60 mph (96.56 km/h) | 67.42 mph (108.5 km/h) |
| 65 mph (104.61 km/h) | 73.04 mph (117.54 km/h) |
| 70 mph (112.65 km/h) | 78.66 mph (126.59 km/h) |
| 75 mph (120.7 km/h) | 84.28 mph (135.63 km/h) |
| 80 mph (128.75 km/h) | 89.89 mph (144.67 km/h) |
| 85 mph (136.79 km/h) | 95.51 mph (153.71 km/h) |
| 90 mph (144.84 km/h) | 101.13 mph (162.75 km/h) |
| 95 mph (152.89 km/h) | 106.75 mph (171.8 km/h) |
| 100 mph (160.93 km/h) | 112.37 mph (180.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1900 | 2208 | 2377 | 2483 | 2596 | 2677 | 2766 | 2871 | 3016 | 3162 | 3324 | 3453 | 3687 | 3946 | 4148 | 4278 | 4351 | 4617 | 4989 | 5798 |
Better Fuel Economy Factory Ratios Increased Power
