Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/70-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.95 (786.2) | 32.07 (814.7) | 1.12 (28.5) 3.6% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 97.24 (2469.92) | 100.77 (2559.46) | 3.53 (89.54) 3.6% |
| Sidewall Height inches (mm) | 6.48 (164.5) | 7.04 (178.75) | 0.56 (14.25) 8.7% |
| Revolutions per mile (km) | 651.58 (404.87) | 628.78 (390.71) | -22.79 (-14.16) -3.5% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.73 mph (33.35 km/h) |
| 25 mph (40.23 km/h) | 25.91 mph (41.69 km/h) |
| 30 mph (48.28 km/h) | 31.09 mph (50.03 km/h) |
| 35 mph (56.33 km/h) | 36.27 mph (58.37 km/h) |
| 40 mph (64.37 km/h) | 41.45 mph (66.71 km/h) |
| 45 mph (72.42 km/h) | 46.63 mph (75.05 km/h) |
| 50 mph (80.47 km/h) | 51.81 mph (83.38 km/h) |
| 55 mph (88.51 km/h) | 56.99 mph (91.72 km/h) |
| 60 mph (96.56 km/h) | 62.18 mph (100.06 km/h) |
| 65 mph (104.61 km/h) | 67.36 mph (108.4 km/h) |
| 70 mph (112.65 km/h) | 72.54 mph (116.74 km/h) |
| 75 mph (120.7 km/h) | 77.72 mph (125.08 km/h) |
| 80 mph (128.75 km/h) | 82.9 mph (133.41 km/h) |
| 85 mph (136.79 km/h) | 88.08 mph (141.75 km/h) |
| 90 mph (144.84 km/h) | 93.26 mph (150.09 km/h) |
| 95 mph (152.89 km/h) | 98.44 mph (158.43 km/h) |
| 100 mph (160.93 km/h) | 103.63 mph (166.77 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
