Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 36/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 36.03 (915.12) | -0.57 (-14.58) -1.6% |
| Width inches (mm) | 12.4 (315) | 12.52 (318) | 0.12 (3) 1% |
| Circum. inches (mm) | 114.99 (2920.74) | 113.19 (2874.93) | -1.8 (-45.8) -1.6% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 9.01 (228.96) | -0.29 (-7.29) -3.1% |
| Revolutions per mile (km) | 551.01 (342.38) | 559.78 (347.83) | 8.78 (5.45) 1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.68 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.6 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.52 km/h) |
| 35 mph (56.33 km/h) | 34.45 mph (55.44 km/h) |
| 40 mph (64.37 km/h) | 39.37 mph (63.36 km/h) |
| 45 mph (72.42 km/h) | 44.29 mph (71.28 km/h) |
| 50 mph (80.47 km/h) | 49.22 mph (79.21 km/h) |
| 55 mph (88.51 km/h) | 54.14 mph (87.13 km/h) |
| 60 mph (96.56 km/h) | 59.06 mph (95.05 km/h) |
| 65 mph (104.61 km/h) | 63.98 mph (102.97 km/h) |
| 70 mph (112.65 km/h) | 68.9 mph (110.89 km/h) |
| 75 mph (120.7 km/h) | 73.82 mph (118.81 km/h) |
| 80 mph (128.75 km/h) | 78.75 mph (126.73 km/h) |
| 85 mph (136.79 km/h) | 83.67 mph (134.65 km/h) |
| 90 mph (144.84 km/h) | 88.59 mph (142.57 km/h) |
| 95 mph (152.89 km/h) | 93.51 mph (150.49 km/h) |
| 100 mph (160.93 km/h) | 98.43 mph (158.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1425 | 1655 | 1782 | 1861 | 1946 | 2006 | 2073 | 2152 | 2261 | 2370 | 2491 | 2588 | 2764 | 2958 | 3110 | 3207 | 3261 | 3461 | 3740 | 4346 |
Better Fuel Economy Factory Ratios Increased Power
