Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/70-17 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.88 (809.8) | 33.16 (842.2) | 1.28 (32.4) 4% |
| Width inches (mm) | 10.63 (270) | 10.83 (275) | 0.2 (5) 1.9% |
| Circum. inches (mm) | 100.16 (2544.06) | 104.17 (2645.85) | 4.01 (101.79) 4% |
| Sidewall Height inches (mm) | 7.44 (189) | 7.58 (192.5) | 0.14 (3.5) 1.9% |
| Revolutions per mile (km) | 632.59 (393.07) | 608.25 (377.95) | -24.34 (-15.12) -3.8% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.8 mph (33.47 km/h) |
| 25 mph (40.23 km/h) | 26 mph (41.84 km/h) |
| 30 mph (48.28 km/h) | 31.2 mph (50.21 km/h) |
| 35 mph (56.33 km/h) | 36.4 mph (58.58 km/h) |
| 40 mph (64.37 km/h) | 41.6 mph (66.95 km/h) |
| 45 mph (72.42 km/h) | 46.8 mph (75.32 km/h) |
| 50 mph (80.47 km/h) | 52 mph (83.69 km/h) |
| 55 mph (88.51 km/h) | 57.2 mph (92.06 km/h) |
| 60 mph (96.56 km/h) | 62.4 mph (100.42 km/h) |
| 65 mph (104.61 km/h) | 67.6 mph (108.79 km/h) |
| 70 mph (112.65 km/h) | 72.8 mph (117.16 km/h) |
| 75 mph (120.7 km/h) | 78 mph (125.53 km/h) |
| 80 mph (128.75 km/h) | 83.2 mph (133.9 km/h) |
| 85 mph (136.79 km/h) | 88.4 mph (142.27 km/h) |
| 90 mph (144.84 km/h) | 93.6 mph (150.64 km/h) |
| 95 mph (152.89 km/h) | 98.8 mph (159.01 km/h) |
| 100 mph (160.93 km/h) | 104 mph (167.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
Better Fuel Economy Factory Ratios Increased Power
