Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 315/30-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 24.44 (620.8) | -13 (-330.2) -34.7% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 117.62 (2987.65) | 76.78 (1950.3) | -40.84 (-1037.35) -34.7% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.72 (94.5) | 0 (0) 0% |
| Revolutions per mile (km) | 538.66 (334.71) | 825.18 (512.74) | 286.51 (178.03) 53.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 13.06 mph (21.01 km/h) |
| 25 mph (40.23 km/h) | 16.32 mph (26.26 km/h) |
| 30 mph (48.28 km/h) | 19.58 mph (31.52 km/h) |
| 35 mph (56.33 km/h) | 22.85 mph (36.77 km/h) |
| 40 mph (64.37 km/h) | 26.11 mph (42.02 km/h) |
| 45 mph (72.42 km/h) | 29.38 mph (47.28 km/h) |
| 50 mph (80.47 km/h) | 32.64 mph (52.53 km/h) |
| 55 mph (88.51 km/h) | 35.9 mph (57.78 km/h) |
| 60 mph (96.56 km/h) | 39.17 mph (63.03 km/h) |
| 65 mph (104.61 km/h) | 42.43 mph (68.29 km/h) |
| 70 mph (112.65 km/h) | 45.7 mph (73.54 km/h) |
| 75 mph (120.7 km/h) | 48.96 mph (78.79 km/h) |
| 80 mph (128.75 km/h) | 52.22 mph (84.04 km/h) |
| 85 mph (136.79 km/h) | 55.49 mph (89.3 km/h) |
| 90 mph (144.84 km/h) | 58.75 mph (94.55 km/h) |
| 95 mph (152.89 km/h) | 62.01 mph (99.8 km/h) |
| 100 mph (160.93 km/h) | 65.28 mph (105.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2100 | 2439 | 2627 | 2743 | 2868 | 2958 | 3056 | 3172 | 3333 | 3494 | 3673 | 3816 | 4075 | 4361 | 4584 | 4727 | 4807 | 5102 | 5513 | 6407 |
Better Fuel Economy Factory Ratios Increased Power
