Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.1 (713.7) | 33.16 (842.2) | 5.06 (128.5) 18% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 88.27 (2242.15) | 104.17 (2645.85) | 15.89 (403.69) 18% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 7.58 (192.5) | 2.53 (64.25) 50.1% |
| Revolutions per mile (km) | 717.77 (446) | 608.25 (377.95) | -109.51 (-68.05) -15.3% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.6 mph (37.98 km/h) |
| 25 mph (40.23 km/h) | 29.5 mph (47.48 km/h) |
| 30 mph (48.28 km/h) | 35.4 mph (56.97 km/h) |
| 35 mph (56.33 km/h) | 41.3 mph (66.47 km/h) |
| 40 mph (64.37 km/h) | 47.2 mph (75.96 km/h) |
| 45 mph (72.42 km/h) | 53.1 mph (85.46 km/h) |
| 50 mph (80.47 km/h) | 59 mph (94.96 km/h) |
| 55 mph (88.51 km/h) | 64.9 mph (104.45 km/h) |
| 60 mph (96.56 km/h) | 70.8 mph (113.95 km/h) |
| 65 mph (104.61 km/h) | 76.7 mph (123.44 km/h) |
| 70 mph (112.65 km/h) | 82.6 mph (132.94 km/h) |
| 75 mph (120.7 km/h) | 88.5 mph (142.43 km/h) |
| 80 mph (128.75 km/h) | 94.4 mph (151.93 km/h) |
| 85 mph (136.79 km/h) | 100.3 mph (161.42 km/h) |
| 90 mph (144.84 km/h) | 106.2 mph (170.92 km/h) |
| 95 mph (152.89 km/h) | 112.1 mph (180.42 km/h) |
| 100 mph (160.93 km/h) | 118 mph (189.91 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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