Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.04 (737.7) | 32.07 (814.7) | 3.03 (77) 10.4% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 91.24 (2317.55) | 100.77 (2559.46) | 9.52 (241.9) 10.4% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 7.04 (178.75) | 1.52 (38.5) 27.5% |
| Revolutions per mile (km) | 694.42 (431.49) | 628.78 (390.71) | -65.63 (-40.78) -9.5% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.09 mph (35.55 km/h) |
| 25 mph (40.23 km/h) | 27.61 mph (44.43 km/h) |
| 30 mph (48.28 km/h) | 33.13 mph (53.32 km/h) |
| 35 mph (56.33 km/h) | 38.65 mph (62.21 km/h) |
| 40 mph (64.37 km/h) | 44.18 mph (71.09 km/h) |
| 45 mph (72.42 km/h) | 49.7 mph (79.98 km/h) |
| 50 mph (80.47 km/h) | 55.22 mph (88.87 km/h) |
| 55 mph (88.51 km/h) | 60.74 mph (97.75 km/h) |
| 60 mph (96.56 km/h) | 66.26 mph (106.64 km/h) |
| 65 mph (104.61 km/h) | 71.78 mph (115.53 km/h) |
| 70 mph (112.65 km/h) | 77.31 mph (124.41 km/h) |
| 75 mph (120.7 km/h) | 82.83 mph (133.3 km/h) |
| 80 mph (128.75 km/h) | 88.35 mph (142.19 km/h) |
| 85 mph (136.79 km/h) | 93.87 mph (151.07 km/h) |
| 90 mph (144.84 km/h) | 99.39 mph (159.96 km/h) |
| 95 mph (152.89 km/h) | 104.92 mph (168.85 km/h) |
| 100 mph (160.93 km/h) | 110.44 mph (177.73 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
