Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.18 (715.7) | 29.04 (737.7) | 0.87 (22) 3.1% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 88.52 (2248.44) | 91.24 (2317.55) | 2.72 (69.12) 3.1% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 5.52 (140.25) | 0.43 (11) 8.5% |
| Revolutions per mile (km) | 715.76 (444.75) | 694.42 (431.49) | -21.35 (-13.26) -3% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.61 mph (33.18 km/h) |
| 25 mph (40.23 km/h) | 25.77 mph (41.47 km/h) |
| 30 mph (48.28 km/h) | 30.92 mph (49.76 km/h) |
| 35 mph (56.33 km/h) | 36.08 mph (58.06 km/h) |
| 40 mph (64.37 km/h) | 41.23 mph (66.35 km/h) |
| 45 mph (72.42 km/h) | 46.38 mph (74.65 km/h) |
| 50 mph (80.47 km/h) | 51.54 mph (82.94 km/h) |
| 55 mph (88.51 km/h) | 56.69 mph (91.23 km/h) |
| 60 mph (96.56 km/h) | 61.84 mph (99.53 km/h) |
| 65 mph (104.61 km/h) | 67 mph (107.82 km/h) |
| 70 mph (112.65 km/h) | 72.15 mph (116.12 km/h) |
| 75 mph (120.7 km/h) | 77.31 mph (124.41 km/h) |
| 80 mph (128.75 km/h) | 82.46 mph (132.71 km/h) |
| 85 mph (136.79 km/h) | 87.61 mph (141 km/h) |
| 90 mph (144.84 km/h) | 92.77 mph (149.29 km/h) |
| 95 mph (152.89 km/h) | 97.92 mph (157.59 km/h) |
| 100 mph (160.93 km/h) | 103.07 mph (165.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1767 | 2053 | 2211 | 2309 | 2414 | 2489 | 2572 | 2670 | 2805 | 2940 | 3091 | 3211 | 3429 | 3670 | 3858 | 3978 | 4046 | 4294 | 4640 | 5392 |
Better Fuel Economy Factory Ratios Increased Power
