Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 365/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 40.99 (1041.2) | 15.55 (395) 61.1% |
| Width inches (mm) | 5.31 (135) | 14.37 (365) | 9.06 (230) 170.4% |
| Circum. inches (mm) | 79.93 (2030.1) | 128.78 (3271.03) | 48.86 (1240.93) 61.1% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 11.5 (292) | 7.78 (197.5) 209% |
| Revolutions per mile (km) | 792.74 (492.59) | 492 (305.71) | -300.74 (-186.87) -37.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 32.23 mph (51.86 km/h) |
| 25 mph (40.23 km/h) | 40.28 mph (64.83 km/h) |
| 30 mph (48.28 km/h) | 48.34 mph (77.79 km/h) |
| 35 mph (56.33 km/h) | 56.39 mph (90.76 km/h) |
| 40 mph (64.37 km/h) | 64.45 mph (103.72 km/h) |
| 45 mph (72.42 km/h) | 72.51 mph (116.69 km/h) |
| 50 mph (80.47 km/h) | 80.56 mph (129.65 km/h) |
| 55 mph (88.51 km/h) | 88.62 mph (142.62 km/h) |
| 60 mph (96.56 km/h) | 96.68 mph (155.59 km/h) |
| 65 mph (104.61 km/h) | 104.73 mph (168.55 km/h) |
| 70 mph (112.65 km/h) | 112.79 mph (181.52 km/h) |
| 75 mph (120.7 km/h) | 120.84 mph (194.48 km/h) |
| 80 mph (128.75 km/h) | 128.9 mph (207.45 km/h) |
| 85 mph (136.79 km/h) | 136.96 mph (220.41 km/h) |
| 90 mph (144.84 km/h) | 145.01 mph (233.38 km/h) |
| 95 mph (152.89 km/h) | 153.07 mph (246.34 km/h) |
| 100 mph (160.93 km/h) | 161.13 mph (259.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1252 | 1455 | 1566 | 1636 | 1710 | 1764 | 1822 | 1891 | 1987 | 2083 | 2190 | 2275 | 2430 | 2600 | 2733 | 2818 | 2866 | 3042 | 3287 | 3820 |
Better Fuel Economy Factory Ratios Increased Power
