Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/60-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.41 (823.2) | 32.07 (814.7) | -0.33 (-8.5) -1% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 101.82 (2586.16) | 100.77 (2559.46) | -1.05 (-26.7) -1% |
| Sidewall Height inches (mm) | 7.2 (183) | 7.04 (178.75) | -0.17 (-4.25) -2.3% |
| Revolutions per mile (km) | 622.29 (386.67) | 628.78 (390.71) | 6.49 (4.03) 1% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.79 mph (31.85 km/h) |
| 25 mph (40.23 km/h) | 24.74 mph (39.82 km/h) |
| 30 mph (48.28 km/h) | 29.69 mph (47.78 km/h) |
| 35 mph (56.33 km/h) | 34.64 mph (55.75 km/h) |
| 40 mph (64.37 km/h) | 39.59 mph (63.71 km/h) |
| 45 mph (72.42 km/h) | 44.54 mph (71.67 km/h) |
| 50 mph (80.47 km/h) | 49.48 mph (79.64 km/h) |
| 55 mph (88.51 km/h) | 54.43 mph (87.6 km/h) |
| 60 mph (96.56 km/h) | 59.38 mph (95.56 km/h) |
| 65 mph (104.61 km/h) | 64.33 mph (103.53 km/h) |
| 70 mph (112.65 km/h) | 69.28 mph (111.49 km/h) |
| 75 mph (120.7 km/h) | 74.23 mph (119.45 km/h) |
| 80 mph (128.75 km/h) | 79.17 mph (127.42 km/h) |
| 85 mph (136.79 km/h) | 84.12 mph (135.38 km/h) |
| 90 mph (144.84 km/h) | 89.07 mph (143.35 km/h) |
| 95 mph (152.89 km/h) | 94.02 mph (151.31 km/h) |
| 100 mph (160.93 km/h) | 98.97 mph (159.27 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
