Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 310/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 35.09 (891.2) | 5.39 (137) 18.2% |
| Width inches (mm) | 6.5 (165) | 12.2 (310) | 5.71 (145) 87.9% |
| Circum. inches (mm) | 93.28 (2369.39) | 110.23 (2799.79) | 16.94 (430.4) 18.2% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 8.54 (217) | 2.7 (68.5) 46.1% |
| Revolutions per mile (km) | 679.22 (422.05) | 574.81 (357.17) | -104.41 (-64.88) -15.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.63 mph (38.03 km/h) |
| 25 mph (40.23 km/h) | 29.54 mph (47.54 km/h) |
| 30 mph (48.28 km/h) | 35.45 mph (57.05 km/h) |
| 35 mph (56.33 km/h) | 41.36 mph (66.56 km/h) |
| 40 mph (64.37 km/h) | 47.27 mph (76.07 km/h) |
| 45 mph (72.42 km/h) | 53.17 mph (85.58 km/h) |
| 50 mph (80.47 km/h) | 59.08 mph (95.08 km/h) |
| 55 mph (88.51 km/h) | 64.99 mph (104.59 km/h) |
| 60 mph (96.56 km/h) | 70.9 mph (114.1 km/h) |
| 65 mph (104.61 km/h) | 76.81 mph (123.61 km/h) |
| 70 mph (112.65 km/h) | 82.72 mph (133.12 km/h) |
| 75 mph (120.7 km/h) | 88.62 mph (142.63 km/h) |
| 80 mph (128.75 km/h) | 94.53 mph (152.13 km/h) |
| 85 mph (136.79 km/h) | 100.44 mph (161.64 km/h) |
| 90 mph (144.84 km/h) | 106.35 mph (171.15 km/h) |
| 95 mph (152.89 km/h) | 112.26 mph (180.66 km/h) |
| 100 mph (160.93 km/h) | 118.16 mph (190.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1463 | 1699 | 1830 | 1911 | 1998 | 2060 | 2129 | 2210 | 2322 | 2434 | 2558 | 2658 | 2838 | 3038 | 3193 | 3293 | 3349 | 3554 | 3841 | 4463 |
Better Fuel Economy Factory Ratios Increased Power
