Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 155/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 27.76 (705.2) | 1.26 (32) 4.8% |
| Width inches (mm) | 5.31 (135) | 6.1 (155) | 0.79 (20) 14.8% |
| Circum. inches (mm) | 83.26 (2114.92) | 87.22 (2215.45) | 3.96 (100.53) 4.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.88 (124) | 0.63 (16) 14.8% |
| Revolutions per mile (km) | 760.95 (472.83) | 726.42 (451.37) | -34.53 (-21.46) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.95 mph (33.72 km/h) |
| 25 mph (40.23 km/h) | 26.19 mph (42.15 km/h) |
| 30 mph (48.28 km/h) | 31.43 mph (50.58 km/h) |
| 35 mph (56.33 km/h) | 36.66 mph (59 km/h) |
| 40 mph (64.37 km/h) | 41.9 mph (67.43 km/h) |
| 45 mph (72.42 km/h) | 47.14 mph (75.86 km/h) |
| 50 mph (80.47 km/h) | 52.38 mph (84.29 km/h) |
| 55 mph (88.51 km/h) | 57.61 mph (92.72 km/h) |
| 60 mph (96.56 km/h) | 62.85 mph (101.15 km/h) |
| 65 mph (104.61 km/h) | 68.09 mph (109.58 km/h) |
| 70 mph (112.65 km/h) | 73.33 mph (118.01 km/h) |
| 75 mph (120.7 km/h) | 78.57 mph (126.44 km/h) |
| 80 mph (128.75 km/h) | 83.8 mph (134.87 km/h) |
| 85 mph (136.79 km/h) | 89.04 mph (143.3 km/h) |
| 90 mph (144.84 km/h) | 94.28 mph (151.73 km/h) |
| 95 mph (152.89 km/h) | 99.52 mph (160.16 km/h) |
| 100 mph (160.93 km/h) | 104.75 mph (168.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1849 | 2148 | 2313 | 2415 | 2525 | 2604 | 2690 | 2793 | 2934 | 3076 | 3233 | 3359 | 3587 | 3839 | 4035 | 4161 | 4232 | 4492 | 4854 | 5640 |
Better Fuel Economy Factory Ratios Increased Power
