Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.16 (842.2) | 32.07 (814.7) | -1.08 (-27.5) -3.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 104.17 (2645.85) | 100.77 (2559.46) | -3.4 (-86.39) -3.3% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.04 (178.75) | -0.54 (-13.75) -7.1% |
| Revolutions per mile (km) | 608.25 (377.95) | 628.78 (390.71) | 20.53 (12.76) 3.4% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.35 mph (31.14 km/h) |
| 25 mph (40.23 km/h) | 24.18 mph (38.92 km/h) |
| 30 mph (48.28 km/h) | 29.02 mph (46.7 km/h) |
| 35 mph (56.33 km/h) | 33.86 mph (54.49 km/h) |
| 40 mph (64.37 km/h) | 38.69 mph (62.27 km/h) |
| 45 mph (72.42 km/h) | 43.53 mph (70.06 km/h) |
| 50 mph (80.47 km/h) | 48.37 mph (77.84 km/h) |
| 55 mph (88.51 km/h) | 53.2 mph (85.62 km/h) |
| 60 mph (96.56 km/h) | 58.04 mph (93.41 km/h) |
| 65 mph (104.61 km/h) | 62.88 mph (101.19 km/h) |
| 70 mph (112.65 km/h) | 67.71 mph (108.98 km/h) |
| 75 mph (120.7 km/h) | 72.55 mph (116.76 km/h) |
| 80 mph (128.75 km/h) | 77.39 mph (124.54 km/h) |
| 85 mph (136.79 km/h) | 82.22 mph (132.33 km/h) |
| 90 mph (144.84 km/h) | 87.06 mph (140.11 km/h) |
| 95 mph (152.89 km/h) | 91.9 mph (147.9 km/h) |
| 100 mph (160.93 km/h) | 96.73 mph (155.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
Better Fuel Economy Factory Ratios Increased Power
