Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-20 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.5) | 33.16 (842.2) | -0.92 (-23.3) -2.7% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 107.05 (2719.05) | 104.17 (2645.85) | -2.88 (-73.2) -2.7% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.58 (192.5) | 0.54 (13.75) 7.7% |
| Revolutions per mile (km) | 591.88 (367.78) | 608.25 (377.95) | 16.37 (10.17) 2.8% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.32 km/h) |
| 25 mph (40.23 km/h) | 24.33 mph (39.15 km/h) |
| 30 mph (48.28 km/h) | 29.19 mph (46.98 km/h) |
| 35 mph (56.33 km/h) | 34.06 mph (54.81 km/h) |
| 40 mph (64.37 km/h) | 38.92 mph (62.64 km/h) |
| 45 mph (72.42 km/h) | 43.79 mph (70.47 km/h) |
| 50 mph (80.47 km/h) | 48.65 mph (78.3 km/h) |
| 55 mph (88.51 km/h) | 53.52 mph (86.13 km/h) |
| 60 mph (96.56 km/h) | 58.38 mph (93.96 km/h) |
| 65 mph (104.61 km/h) | 63.25 mph (101.79 km/h) |
| 70 mph (112.65 km/h) | 68.12 mph (109.62 km/h) |
| 75 mph (120.7 km/h) | 72.98 mph (117.45 km/h) |
| 80 mph (128.75 km/h) | 77.85 mph (125.28 km/h) |
| 85 mph (136.79 km/h) | 82.71 mph (133.11 km/h) |
| 90 mph (144.84 km/h) | 87.58 mph (140.94 km/h) |
| 95 mph (152.89 km/h) | 92.44 mph (148.77 km/h) |
| 100 mph (160.93 km/h) | 97.31 mph (156.6 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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