Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.83 (884.7) | 33.16 (842.2) | -1.67 (-42.5) -4.8% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 109.42 (2779.37) | 104.17 (2645.85) | -5.26 (-133.52) -4.8% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 7.58 (192.5) | -0.84 (-21.25) -9.9% |
| Revolutions per mile (km) | 579.03 (359.79) | 608.25 (377.95) | 29.22 (18.16) 5% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.04 mph (30.64 km/h) |
| 25 mph (40.23 km/h) | 23.8 mph (38.3 km/h) |
| 30 mph (48.28 km/h) | 28.56 mph (45.96 km/h) |
| 35 mph (56.33 km/h) | 33.32 mph (53.62 km/h) |
| 40 mph (64.37 km/h) | 38.08 mph (61.28 km/h) |
| 45 mph (72.42 km/h) | 42.84 mph (68.94 km/h) |
| 50 mph (80.47 km/h) | 47.6 mph (76.6 km/h) |
| 55 mph (88.51 km/h) | 52.36 mph (84.26 km/h) |
| 60 mph (96.56 km/h) | 57.12 mph (91.92 km/h) |
| 65 mph (104.61 km/h) | 61.88 mph (99.58 km/h) |
| 70 mph (112.65 km/h) | 66.64 mph (107.24 km/h) |
| 75 mph (120.7 km/h) | 71.4 mph (114.9 km/h) |
| 80 mph (128.75 km/h) | 76.16 mph (122.56 km/h) |
| 85 mph (136.79 km/h) | 80.92 mph (130.22 km/h) |
| 90 mph (144.84 km/h) | 85.68 mph (137.88 km/h) |
| 95 mph (152.89 km/h) | 90.44 mph (145.54 km/h) |
| 100 mph (160.93 km/h) | 95.2 mph (153.2 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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