Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.54 (775.7) | 32.07 (814.7) | 1.54 (39) 5% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 95.94 (2436.93) | 100.77 (2559.46) | 4.82 (122.52) 5% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 7.04 (178.75) | 0.77 (19.5) 12.2% |
| Revolutions per mile (km) | 660.4 (410.35) | 628.78 (390.71) | -31.61 (-19.64) -4.8% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.01 mph (33.81 km/h) |
| 25 mph (40.23 km/h) | 26.26 mph (42.26 km/h) |
| 30 mph (48.28 km/h) | 31.51 mph (50.71 km/h) |
| 35 mph (56.33 km/h) | 36.76 mph (59.16 km/h) |
| 40 mph (64.37 km/h) | 42.01 mph (67.61 km/h) |
| 45 mph (72.42 km/h) | 47.26 mph (76.06 km/h) |
| 50 mph (80.47 km/h) | 52.51 mph (84.51 km/h) |
| 55 mph (88.51 km/h) | 57.77 mph (92.96 km/h) |
| 60 mph (96.56 km/h) | 63.02 mph (101.42 km/h) |
| 65 mph (104.61 km/h) | 68.27 mph (109.87 km/h) |
| 70 mph (112.65 km/h) | 73.52 mph (118.32 km/h) |
| 75 mph (120.7 km/h) | 78.77 mph (126.77 km/h) |
| 80 mph (128.75 km/h) | 84.02 mph (135.22 km/h) |
| 85 mph (136.79 km/h) | 89.27 mph (143.67 km/h) |
| 90 mph (144.84 km/h) | 94.52 mph (152.12 km/h) |
| 95 mph (152.89 km/h) | 99.78 mph (160.57 km/h) |
| 100 mph (160.93 km/h) | 105.03 mph (169.03 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
