Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 370/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 36.94 (938.2) | 9.02 (229) 32.3% |
| Width inches (mm) | 7.09 (180) | 14.57 (370) | 7.48 (190) 105.6% |
| Circum. inches (mm) | 87.72 (2228.02) | 116.04 (2947.44) | 28.32 (719.42) 32.3% |
| Sidewall Height inches (mm) | 4.96 (126) | 9.47 (240.5) | 4.51 (114.5) 90.9% |
| Revolutions per mile (km) | 722.32 (448.83) | 546.01 (339.28) | -176.31 (-109.55) -24.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.46 mph (42.58 km/h) |
| 25 mph (40.23 km/h) | 33.07 mph (53.23 km/h) |
| 30 mph (48.28 km/h) | 39.69 mph (63.87 km/h) |
| 35 mph (56.33 km/h) | 46.3 mph (74.52 km/h) |
| 40 mph (64.37 km/h) | 52.92 mph (85.16 km/h) |
| 45 mph (72.42 km/h) | 59.53 mph (95.81 km/h) |
| 50 mph (80.47 km/h) | 66.14 mph (106.45 km/h) |
| 55 mph (88.51 km/h) | 72.76 mph (117.1 km/h) |
| 60 mph (96.56 km/h) | 79.37 mph (127.74 km/h) |
| 65 mph (104.61 km/h) | 85.99 mph (138.39 km/h) |
| 70 mph (112.65 km/h) | 92.6 mph (149.03 km/h) |
| 75 mph (120.7 km/h) | 99.22 mph (159.68 km/h) |
| 80 mph (128.75 km/h) | 105.83 mph (170.32 km/h) |
| 85 mph (136.79 km/h) | 112.45 mph (180.97 km/h) |
| 90 mph (144.84 km/h) | 119.06 mph (191.61 km/h) |
| 95 mph (152.89 km/h) | 125.68 mph (202.26 km/h) |
| 100 mph (160.93 km/h) | 132.29 mph (212.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1390 | 1614 | 1738 | 1815 | 1898 | 1957 | 2022 | 2099 | 2205 | 2312 | 2430 | 2525 | 2696 | 2885 | 3033 | 3128 | 3181 | 3376 | 3648 | 4239 |
Better Fuel Economy Factory Ratios Increased Power
