Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/75-15 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.88 (733.5) | 33.16 (842.2) | 4.28 (108.7) 14.8% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 90.72 (2304.36) | 104.17 (2645.85) | 13.44 (341.49) 14.8% |
| Sidewall Height inches (mm) | 6.94 (176.25) | 7.58 (192.5) | 0.64 (16.25) 9.2% |
| Revolutions per mile (km) | 698.39 (433.96) | 608.25 (377.95) | -90.14 (-56.01) -12.9% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.96 mph (36.96 km/h) |
| 25 mph (40.23 km/h) | 28.7 mph (46.2 km/h) |
| 30 mph (48.28 km/h) | 34.45 mph (55.44 km/h) |
| 35 mph (56.33 km/h) | 40.19 mph (64.67 km/h) |
| 40 mph (64.37 km/h) | 45.93 mph (73.91 km/h) |
| 45 mph (72.42 km/h) | 51.67 mph (83.15 km/h) |
| 50 mph (80.47 km/h) | 57.41 mph (92.39 km/h) |
| 55 mph (88.51 km/h) | 63.15 mph (101.63 km/h) |
| 60 mph (96.56 km/h) | 68.89 mph (110.87 km/h) |
| 65 mph (104.61 km/h) | 74.63 mph (120.11 km/h) |
| 70 mph (112.65 km/h) | 80.37 mph (129.35 km/h) |
| 75 mph (120.7 km/h) | 86.11 mph (138.59 km/h) |
| 80 mph (128.75 km/h) | 91.86 mph (147.83 km/h) |
| 85 mph (136.79 km/h) | 97.6 mph (157.07 km/h) |
| 90 mph (144.84 km/h) | 103.34 mph (166.31 km/h) |
| 95 mph (152.89 km/h) | 109.08 mph (175.54 km/h) |
| 100 mph (160.93 km/h) | 114.82 mph (184.78 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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