Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-17 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.54 (750.3) | 32.07 (814.7) | 2.54 (64.4) 8.6% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 92.8 (2357.14) | 100.77 (2559.46) | 7.97 (202.32) 8.6% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 7.04 (178.75) | 0.77 (19.5) 12.2% |
| Revolutions per mile (km) | 682.75 (424.24) | 628.78 (390.71) | -53.97 (-33.54) -7.9% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.72 mph (34.95 km/h) |
| 25 mph (40.23 km/h) | 27.15 mph (43.69 km/h) |
| 30 mph (48.28 km/h) | 32.57 mph (52.42 km/h) |
| 35 mph (56.33 km/h) | 38 mph (61.16 km/h) |
| 40 mph (64.37 km/h) | 43.43 mph (69.9 km/h) |
| 45 mph (72.42 km/h) | 48.86 mph (78.64 km/h) |
| 50 mph (80.47 km/h) | 54.29 mph (87.37 km/h) |
| 55 mph (88.51 km/h) | 59.72 mph (96.11 km/h) |
| 60 mph (96.56 km/h) | 65.15 mph (104.85 km/h) |
| 65 mph (104.61 km/h) | 70.58 mph (113.59 km/h) |
| 70 mph (112.65 km/h) | 76.01 mph (122.32 km/h) |
| 75 mph (120.7 km/h) | 81.44 mph (131.06 km/h) |
| 80 mph (128.75 km/h) | 86.87 mph (139.8 km/h) |
| 85 mph (136.79 km/h) | 92.3 mph (148.54 km/h) |
| 90 mph (144.84 km/h) | 97.72 mph (157.27 km/h) |
| 95 mph (152.89 km/h) | 103.15 mph (166.01 km/h) |
| 100 mph (160.93 km/h) | 108.58 mph (174.75 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
