Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 240/45-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 29.04 (737.7) | 2.54 (64.5) 9.6% |
| Width inches (mm) | 9.45 (240) | 10.04 (255) | 0.59 (15) 6.2% |
| Circum. inches (mm) | 83.26 (2114.92) | 91.24 (2317.55) | 7.98 (202.63) 9.6% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.52 (140.25) | 1.27 (32.25) 29.9% |
| Revolutions per mile (km) | 760.95 (472.83) | 694.42 (431.49) | -66.53 (-41.34) -8.7% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.92 mph (35.27 km/h) |
| 25 mph (40.23 km/h) | 27.4 mph (44.09 km/h) |
| 30 mph (48.28 km/h) | 32.87 mph (52.91 km/h) |
| 35 mph (56.33 km/h) | 38.35 mph (61.72 km/h) |
| 40 mph (64.37 km/h) | 43.83 mph (70.54 km/h) |
| 45 mph (72.42 km/h) | 49.31 mph (79.36 km/h) |
| 50 mph (80.47 km/h) | 54.79 mph (88.18 km/h) |
| 55 mph (88.51 km/h) | 60.27 mph (96.99 km/h) |
| 60 mph (96.56 km/h) | 65.75 mph (105.81 km/h) |
| 65 mph (104.61 km/h) | 71.23 mph (114.63 km/h) |
| 70 mph (112.65 km/h) | 76.71 mph (123.45 km/h) |
| 75 mph (120.7 km/h) | 82.19 mph (132.27 km/h) |
| 80 mph (128.75 km/h) | 87.66 mph (141.08 km/h) |
| 85 mph (136.79 km/h) | 93.14 mph (149.9 km/h) |
| 90 mph (144.84 km/h) | 98.62 mph (158.72 km/h) |
| 95 mph (152.89 km/h) | 104.1 mph (167.54 km/h) |
| 100 mph (160.93 km/h) | 109.58 mph (176.35 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 |
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