Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-16 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.5 (622.4) | 28.18 (715.7) | 3.67 (93.3) 15% |
| Width inches (mm) | 5.31 (135) | 9.25 (235) | 3.94 (100) 74.1% |
| Circum. inches (mm) | 76.98 (1955.33) | 88.52 (2248.44) | 11.54 (293.11) 15% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.09 (129.25) | 0.84 (21.25) 19.7% |
| Revolutions per mile (km) | 823.06 (511.42) | 715.76 (444.75) | -107.3 (-66.67) -13% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23 mph (37.01 km/h) |
| 25 mph (40.23 km/h) | 28.75 mph (46.26 km/h) |
| 30 mph (48.28 km/h) | 34.5 mph (55.52 km/h) |
| 35 mph (56.33 km/h) | 40.25 mph (64.77 km/h) |
| 40 mph (64.37 km/h) | 46 mph (74.02 km/h) |
| 45 mph (72.42 km/h) | 51.75 mph (83.28 km/h) |
| 50 mph (80.47 km/h) | 57.5 mph (92.53 km/h) |
| 55 mph (88.51 km/h) | 63.24 mph (101.78 km/h) |
| 60 mph (96.56 km/h) | 68.99 mph (111.04 km/h) |
| 65 mph (104.61 km/h) | 74.74 mph (120.29 km/h) |
| 70 mph (112.65 km/h) | 80.49 mph (129.54 km/h) |
| 75 mph (120.7 km/h) | 86.24 mph (138.79 km/h) |
| 80 mph (128.75 km/h) | 91.99 mph (148.05 km/h) |
| 85 mph (136.79 km/h) | 97.74 mph (157.3 km/h) |
| 90 mph (144.84 km/h) | 103.49 mph (166.55 km/h) |
| 95 mph (152.89 km/h) | 109.24 mph (175.81 km/h) |
| 100 mph (160.93 km/h) | 114.99 mph (185.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2116 | 2279 | 2380 | 2488 | 2566 | 2651 | 2752 | 2891 | 3031 | 3186 | 3310 | 3534 | 3782 | 3976 | 4100 | 4170 | 4426 | 4782 | 5557 |
Better Fuel Economy Factory Ratios Increased Power
