Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/60-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.05 (763.2) | 32.07 (814.7) | 2.03 (51.5) 6.7% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 94.4 (2397.66) | 100.77 (2559.46) | 6.37 (161.79) 6.7% |
| Sidewall Height inches (mm) | 6.02 (153) | 7.04 (178.75) | 1.01 (25.75) 16.8% |
| Revolutions per mile (km) | 671.21 (417.07) | 628.78 (390.71) | -42.43 (-26.36) -6.3% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.35 mph (34.36 km/h) |
| 25 mph (40.23 km/h) | 26.69 mph (42.95 km/h) |
| 30 mph (48.28 km/h) | 32.02 mph (51.54 km/h) |
| 35 mph (56.33 km/h) | 37.36 mph (60.13 km/h) |
| 40 mph (64.37 km/h) | 42.7 mph (68.72 km/h) |
| 45 mph (72.42 km/h) | 48.04 mph (77.31 km/h) |
| 50 mph (80.47 km/h) | 53.37 mph (85.9 km/h) |
| 55 mph (88.51 km/h) | 58.71 mph (94.49 km/h) |
| 60 mph (96.56 km/h) | 64.05 mph (103.08 km/h) |
| 65 mph (104.61 km/h) | 69.39 mph (111.67 km/h) |
| 70 mph (112.65 km/h) | 74.72 mph (120.26 km/h) |
| 75 mph (120.7 km/h) | 80.06 mph (128.85 km/h) |
| 80 mph (128.75 km/h) | 85.4 mph (137.44 km/h) |
| 85 mph (136.79 km/h) | 90.74 mph (146.03 km/h) |
| 90 mph (144.84 km/h) | 96.07 mph (154.61 km/h) |
| 95 mph (152.89 km/h) | 101.41 mph (163.2 km/h) |
| 100 mph (160.93 km/h) | 106.75 mph (171.79 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
