Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/45-15 | 305/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.2 (538.5) | 27.01 (686) | 5.81 (147.5) 27.4% |
| Width inches (mm) | 6.89 (175) | 12.01 (305) | 5.12 (130) 74.3% |
| Circum. inches (mm) | 66.6 (1691.75) | 84.85 (2155.13) | 18.24 (463.38) 27.4% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 6 (152.5) | 2.9 (73.75) 93.7% |
| Revolutions per mile (km) | 951.29 (591.1) | 746.75 (464.01) | -204.54 (-127.1) -21.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.48 mph (41 km/h) |
| 25 mph (40.23 km/h) | 31.85 mph (51.25 km/h) |
| 30 mph (48.28 km/h) | 38.22 mph (61.5 km/h) |
| 35 mph (56.33 km/h) | 44.59 mph (71.76 km/h) |
| 40 mph (64.37 km/h) | 50.96 mph (82.01 km/h) |
| 45 mph (72.42 km/h) | 57.33 mph (92.26 km/h) |
| 50 mph (80.47 km/h) | 63.7 mph (102.51 km/h) |
| 55 mph (88.51 km/h) | 70.06 mph (112.76 km/h) |
| 60 mph (96.56 km/h) | 76.43 mph (123.01 km/h) |
| 65 mph (104.61 km/h) | 82.8 mph (133.26 km/h) |
| 70 mph (112.65 km/h) | 89.17 mph (143.51 km/h) |
| 75 mph (120.7 km/h) | 95.54 mph (153.76 km/h) |
| 80 mph (128.75 km/h) | 101.91 mph (164.01 km/h) |
| 85 mph (136.79 km/h) | 108.28 mph (174.26 km/h) |
| 90 mph (144.84 km/h) | 114.65 mph (184.51 km/h) |
| 95 mph (152.89 km/h) | 121.02 mph (194.77 km/h) |
| 100 mph (160.93 km/h) | 127.39 mph (205.02 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
