Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 310/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 35.31 (896.8) | 4.91 (124.6) 16.1% |
| Width inches (mm) | 6.89 (175) | 12.2 (310) | 5.31 (135) 77.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 110.92 (2817.38) | 15.41 (391.44) 16.1% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 9.15 (232.5) | 2.95 (75) 47.6% |
| Revolutions per mile (km) | 663.39 (412.21) | 571.22 (354.94) | -92.17 (-57.27) -13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.23 mph (37.38 km/h) |
| 25 mph (40.23 km/h) | 29.03 mph (46.73 km/h) |
| 30 mph (48.28 km/h) | 34.84 mph (56.07 km/h) |
| 35 mph (56.33 km/h) | 40.65 mph (65.42 km/h) |
| 40 mph (64.37 km/h) | 46.45 mph (74.76 km/h) |
| 45 mph (72.42 km/h) | 52.26 mph (84.11 km/h) |
| 50 mph (80.47 km/h) | 58.07 mph (93.45 km/h) |
| 55 mph (88.51 km/h) | 63.87 mph (102.8 km/h) |
| 60 mph (96.56 km/h) | 69.68 mph (112.14 km/h) |
| 65 mph (104.61 km/h) | 75.49 mph (121.49 km/h) |
| 70 mph (112.65 km/h) | 81.3 mph (130.83 km/h) |
| 75 mph (120.7 km/h) | 87.1 mph (140.18 km/h) |
| 80 mph (128.75 km/h) | 92.91 mph (149.52 km/h) |
| 85 mph (136.79 km/h) | 98.72 mph (158.87 km/h) |
| 90 mph (144.84 km/h) | 104.52 mph (168.21 km/h) |
| 95 mph (152.89 km/h) | 110.33 mph (177.56 km/h) |
| 100 mph (160.93 km/h) | 116.14 mph (186.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1454 | 1689 | 1819 | 1899 | 1986 | 2047 | 2116 | 2196 | 2307 | 2419 | 2542 | 2641 | 2821 | 3019 | 3173 | 3272 | 3328 | 3532 | 3817 | 4435 |
Better Fuel Economy Factory Ratios Increased Power
