Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-17 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.71 (830.8) | 33.16 (842.2) | 0.45 (11.4) 1.4% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 102.76 (2610.04) | 104.17 (2645.85) | 1.41 (35.81) 1.4% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.58 (192.5) | -0.28 (-7) -3.5% |
| Revolutions per mile (km) | 616.6 (383.14) | 608.25 (377.95) | -8.35 (-5.19) -1.4% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.63 km/h) |
| 25 mph (40.23 km/h) | 25.34 mph (40.79 km/h) |
| 30 mph (48.28 km/h) | 30.41 mph (48.94 km/h) |
| 35 mph (56.33 km/h) | 35.48 mph (57.1 km/h) |
| 40 mph (64.37 km/h) | 40.55 mph (65.26 km/h) |
| 45 mph (72.42 km/h) | 45.62 mph (73.41 km/h) |
| 50 mph (80.47 km/h) | 50.69 mph (81.57 km/h) |
| 55 mph (88.51 km/h) | 55.75 mph (89.73 km/h) |
| 60 mph (96.56 km/h) | 60.82 mph (97.89 km/h) |
| 65 mph (104.61 km/h) | 65.89 mph (106.04 km/h) |
| 70 mph (112.65 km/h) | 70.96 mph (114.2 km/h) |
| 75 mph (120.7 km/h) | 76.03 mph (122.36 km/h) |
| 80 mph (128.75 km/h) | 81.1 mph (130.51 km/h) |
| 85 mph (136.79 km/h) | 86.17 mph (138.67 km/h) |
| 90 mph (144.84 km/h) | 91.23 mph (146.83 km/h) |
| 95 mph (152.89 km/h) | 96.3 mph (154.99 km/h) |
| 100 mph (160.93 km/h) | 101.37 mph (163.14 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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