Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/65-15 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.49 (647.5) | 32.07 (814.7) | 6.58 (167.2) 25.8% |
| Width inches (mm) | 8.07 (205) | 10.83 (275) | 2.76 (70) 34.1% |
| Circum. inches (mm) | 80.09 (2034.18) | 100.77 (2559.46) | 20.68 (525.27) 25.8% |
| Sidewall Height inches (mm) | 5.25 (133.25) | 7.04 (178.75) | 1.79 (45.5) 34.1% |
| Revolutions per mile (km) | 791.15 (491.6) | 628.78 (390.71) | -162.37 (-100.89) -20.5% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.16 mph (40.5 km/h) |
| 25 mph (40.23 km/h) | 31.46 mph (50.62 km/h) |
| 30 mph (48.28 km/h) | 37.75 mph (60.75 km/h) |
| 35 mph (56.33 km/h) | 44.04 mph (70.87 km/h) |
| 40 mph (64.37 km/h) | 50.33 mph (81 km/h) |
| 45 mph (72.42 km/h) | 56.62 mph (91.12 km/h) |
| 50 mph (80.47 km/h) | 62.91 mph (101.25 km/h) |
| 55 mph (88.51 km/h) | 69.2 mph (111.37 km/h) |
| 60 mph (96.56 km/h) | 75.49 mph (121.5 km/h) |
| 65 mph (104.61 km/h) | 81.78 mph (131.62 km/h) |
| 70 mph (112.65 km/h) | 88.08 mph (141.74 km/h) |
| 75 mph (120.7 km/h) | 94.37 mph (151.87 km/h) |
| 80 mph (128.75 km/h) | 100.66 mph (161.99 km/h) |
| 85 mph (136.79 km/h) | 106.95 mph (172.12 km/h) |
| 90 mph (144.84 km/h) | 113.24 mph (182.24 km/h) |
| 95 mph (152.89 km/h) | 119.53 mph (192.37 km/h) |
| 100 mph (160.93 km/h) | 125.82 mph (202.49 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
