Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 315/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 34.12 (866.7) | 0.1 (2.46) 0.3% |
| Width inches (mm) | 12.52 (318) | 12.4 (315) | -0.12 (-3) -0.9% |
| Circum. inches (mm) | 106.89 (2715.09) | 107.2 (2722.82) | 0.3 (7.73) 0.3% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 8.06 (204.75) | 0.05 (1.23) 0.6% |
| Revolutions per mile (km) | 592.74 (368.31) | 591.06 (367.27) | -1.68 (-1.05) -0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.28 km/h) |
| 25 mph (40.23 km/h) | 25.07 mph (40.35 km/h) |
| 30 mph (48.28 km/h) | 30.09 mph (48.42 km/h) |
| 35 mph (56.33 km/h) | 35.1 mph (56.49 km/h) |
| 40 mph (64.37 km/h) | 40.11 mph (64.56 km/h) |
| 45 mph (72.42 km/h) | 45.13 mph (72.63 km/h) |
| 50 mph (80.47 km/h) | 50.14 mph (80.7 km/h) |
| 55 mph (88.51 km/h) | 55.16 mph (88.77 km/h) |
| 60 mph (96.56 km/h) | 60.17 mph (96.84 km/h) |
| 65 mph (104.61 km/h) | 65.19 mph (104.91 km/h) |
| 70 mph (112.65 km/h) | 70.2 mph (112.97 km/h) |
| 75 mph (120.7 km/h) | 75.21 mph (121.04 km/h) |
| 80 mph (128.75 km/h) | 80.23 mph (129.11 km/h) |
| 85 mph (136.79 km/h) | 85.24 mph (137.18 km/h) |
| 90 mph (144.84 km/h) | 90.26 mph (145.25 km/h) |
| 95 mph (152.89 km/h) | 95.27 mph (153.32 km/h) |
| 100 mph (160.93 km/h) | 100.28 mph (161.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1504 | 1747 | 1882 | 1965 | 2055 | 2119 | 2189 | 2272 | 2387 | 2503 | 2631 | 2733 | 2919 | 3123 | 3283 | 3386 | 3443 | 3655 | 3949 | 4589 |
Better Fuel Economy Factory Ratios Increased Power
