Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 33.16 (842.2) | 2.81 (71.5) 9.3% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 95.32 (2421.23) | 104.17 (2645.85) | 8.84 (224.62) 9.3% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 7.58 (192.5) | 1.41 (35.75) 22.8% |
| Revolutions per mile (km) | 664.68 (413.01) | 608.25 (377.95) | -56.43 (-35.06) -8.5% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.86 mph (35.17 km/h) |
| 25 mph (40.23 km/h) | 27.32 mph (43.97 km/h) |
| 30 mph (48.28 km/h) | 32.78 mph (52.76 km/h) |
| 35 mph (56.33 km/h) | 38.25 mph (61.55 km/h) |
| 40 mph (64.37 km/h) | 43.71 mph (70.35 km/h) |
| 45 mph (72.42 km/h) | 49.17 mph (79.14 km/h) |
| 50 mph (80.47 km/h) | 54.64 mph (87.93 km/h) |
| 55 mph (88.51 km/h) | 60.1 mph (96.73 km/h) |
| 60 mph (96.56 km/h) | 65.57 mph (105.52 km/h) |
| 65 mph (104.61 km/h) | 71.03 mph (114.31 km/h) |
| 70 mph (112.65 km/h) | 76.49 mph (123.11 km/h) |
| 75 mph (120.7 km/h) | 81.96 mph (131.9 km/h) |
| 80 mph (128.75 km/h) | 87.42 mph (140.69 km/h) |
| 85 mph (136.79 km/h) | 92.89 mph (149.49 km/h) |
| 90 mph (144.84 km/h) | 98.35 mph (158.28 km/h) |
| 95 mph (152.89 km/h) | 103.81 mph (167.07 km/h) |
| 100 mph (160.93 km/h) | 109.28 mph (175.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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