Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 155/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 28.98 (736.2) | 2.48 (63) 9.4% |
| Width inches (mm) | 5.31 (135) | 6.1 (155) | 0.79 (20) 14.8% |
| Circum. inches (mm) | 83.26 (2114.92) | 91.06 (2312.84) | 7.79 (197.92) 9.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.49 (139.5) | 1.24 (31.5) 29.2% |
| Revolutions per mile (km) | 760.95 (472.83) | 695.83 (432.37) | -65.12 (-40.46) -8.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.87 mph (35.2 km/h) |
| 25 mph (40.23 km/h) | 27.34 mph (44 km/h) |
| 30 mph (48.28 km/h) | 32.81 mph (52.8 km/h) |
| 35 mph (56.33 km/h) | 38.28 mph (61.6 km/h) |
| 40 mph (64.37 km/h) | 43.74 mph (70.4 km/h) |
| 45 mph (72.42 km/h) | 49.21 mph (79.2 km/h) |
| 50 mph (80.47 km/h) | 54.68 mph (88 km/h) |
| 55 mph (88.51 km/h) | 60.15 mph (96.8 km/h) |
| 60 mph (96.56 km/h) | 65.61 mph (105.6 km/h) |
| 65 mph (104.61 km/h) | 71.08 mph (114.4 km/h) |
| 70 mph (112.65 km/h) | 76.55 mph (123.2 km/h) |
| 75 mph (120.7 km/h) | 82.02 mph (132 km/h) |
| 80 mph (128.75 km/h) | 87.49 mph (140.8 km/h) |
| 85 mph (136.79 km/h) | 92.95 mph (149.6 km/h) |
| 90 mph (144.84 km/h) | 98.42 mph (158.4 km/h) |
| 95 mph (152.89 km/h) | 103.89 mph (167.2 km/h) |
| 100 mph (160.93 km/h) | 109.36 mph (176 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1771 | 2057 | 2215 | 2313 | 2419 | 2494 | 2577 | 2675 | 2811 | 2946 | 3097 | 3217 | 3436 | 3677 | 3866 | 3986 | 4054 | 4303 | 4649 | 5403 |
Better Fuel Economy Factory Ratios Increased Power
