Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/45-15 | 375/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.2 (538.5) | 28.29 (718.5) | 7.09 (180) 33.4% |
| Width inches (mm) | 6.89 (175) | 14.76 (375) | 7.87 (200) 114.3% |
| Circum. inches (mm) | 66.6 (1691.75) | 88.87 (2257.23) | 22.26 (565.49) 33.4% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 6.64 (168.75) | 3.54 (90) 114.3% |
| Revolutions per mile (km) | 951.29 (591.1) | 712.97 (443.02) | -238.32 (-148.08) -25.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.69 mph (42.95 km/h) |
| 25 mph (40.23 km/h) | 33.36 mph (53.68 km/h) |
| 30 mph (48.28 km/h) | 40.03 mph (64.42 km/h) |
| 35 mph (56.33 km/h) | 46.7 mph (75.16 km/h) |
| 40 mph (64.37 km/h) | 53.37 mph (85.89 km/h) |
| 45 mph (72.42 km/h) | 60.04 mph (96.63 km/h) |
| 50 mph (80.47 km/h) | 66.71 mph (107.36 km/h) |
| 55 mph (88.51 km/h) | 73.38 mph (118.1 km/h) |
| 60 mph (96.56 km/h) | 80.06 mph (128.84 km/h) |
| 65 mph (104.61 km/h) | 86.73 mph (139.57 km/h) |
| 70 mph (112.65 km/h) | 93.4 mph (150.31 km/h) |
| 75 mph (120.7 km/h) | 100.07 mph (161.05 km/h) |
| 80 mph (128.75 km/h) | 106.74 mph (171.78 km/h) |
| 85 mph (136.79 km/h) | 113.41 mph (182.52 km/h) |
| 90 mph (144.84 km/h) | 120.08 mph (193.26 km/h) |
| 95 mph (152.89 km/h) | 126.75 mph (203.99 km/h) |
| 100 mph (160.93 km/h) | 133.43 mph (214.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1814 | 2108 | 2270 | 2370 | 2478 | 2556 | 2640 | 2741 | 2880 | 3019 | 3173 | 3297 | 3521 | 3768 | 3961 | 4084 | 4154 | 4409 | 4764 | 5536 |
Better Fuel Economy Factory Ratios Increased Power
