Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 375/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 37.19 (944.7) | 9.27 (235.5) 33.2% |
| Width inches (mm) | 7.09 (180) | 14.76 (375) | 7.68 (195) 108.3% |
| Circum. inches (mm) | 87.72 (2228.02) | 116.84 (2967.86) | 29.13 (739.85) 33.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 9.6 (243.75) | 4.64 (117.75) 93.5% |
| Revolutions per mile (km) | 722.32 (448.83) | 542.26 (336.94) | -180.06 (-111.89) -24.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.64 mph (42.88 km/h) |
| 25 mph (40.23 km/h) | 33.3 mph (53.59 km/h) |
| 30 mph (48.28 km/h) | 39.96 mph (64.31 km/h) |
| 35 mph (56.33 km/h) | 46.62 mph (75.03 km/h) |
| 40 mph (64.37 km/h) | 53.28 mph (85.75 km/h) |
| 45 mph (72.42 km/h) | 59.94 mph (96.47 km/h) |
| 50 mph (80.47 km/h) | 66.6 mph (107.19 km/h) |
| 55 mph (88.51 km/h) | 73.26 mph (117.91 km/h) |
| 60 mph (96.56 km/h) | 79.92 mph (128.63 km/h) |
| 65 mph (104.61 km/h) | 86.58 mph (139.34 km/h) |
| 70 mph (112.65 km/h) | 93.24 mph (150.06 km/h) |
| 75 mph (120.7 km/h) | 99.9 mph (160.78 km/h) |
| 80 mph (128.75 km/h) | 106.57 mph (171.5 km/h) |
| 85 mph (136.79 km/h) | 113.23 mph (182.22 km/h) |
| 90 mph (144.84 km/h) | 119.89 mph (192.94 km/h) |
| 95 mph (152.89 km/h) | 126.55 mph (203.66 km/h) |
| 100 mph (160.93 km/h) | 133.21 mph (214.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1380 | 1603 | 1726 | 1803 | 1885 | 1944 | 2008 | 2085 | 2190 | 2296 | 2413 | 2507 | 2678 | 2866 | 3012 | 3106 | 3159 | 3353 | 3623 | 4210 |
Better Fuel Economy Factory Ratios Increased Power
