Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/65-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.03 (762.7) | 32.07 (814.7) | 2.05 (52) 6.8% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 94.33 (2396.09) | 100.77 (2559.46) | 6.43 (163.36) 6.8% |
| Sidewall Height inches (mm) | 6.01 (152.75) | 7.04 (178.75) | 1.02 (26) 17% |
| Revolutions per mile (km) | 671.65 (417.35) | 628.78 (390.71) | -42.87 (-26.64) -6.4% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.38 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.98 km/h) |
| 30 mph (48.28 km/h) | 32.05 mph (51.57 km/h) |
| 35 mph (56.33 km/h) | 37.39 mph (60.17 km/h) |
| 40 mph (64.37 km/h) | 42.73 mph (68.76 km/h) |
| 45 mph (72.42 km/h) | 48.07 mph (77.36 km/h) |
| 50 mph (80.47 km/h) | 53.41 mph (85.95 km/h) |
| 55 mph (88.51 km/h) | 58.75 mph (94.55 km/h) |
| 60 mph (96.56 km/h) | 64.09 mph (103.14 km/h) |
| 65 mph (104.61 km/h) | 69.43 mph (111.74 km/h) |
| 70 mph (112.65 km/h) | 74.77 mph (120.33 km/h) |
| 75 mph (120.7 km/h) | 80.11 mph (128.93 km/h) |
| 80 mph (128.75 km/h) | 85.45 mph (137.53 km/h) |
| 85 mph (136.79 km/h) | 90.8 mph (146.12 km/h) |
| 90 mph (144.84 km/h) | 96.14 mph (154.72 km/h) |
| 95 mph (152.89 km/h) | 101.48 mph (163.31 km/h) |
| 100 mph (160.93 km/h) | 106.82 mph (171.91 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
