Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 275/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 34.24 (869.7) | 3.84 (97.5) 12.6% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 95.51 (2425.94) | 107.57 (2732.24) | 12.06 (306.31) 12.6% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 8.12 (206.25) | 1.92 (48.75) 31% |
| Revolutions per mile (km) | 663.39 (412.21) | 589.02 (366) | -74.37 (-46.21) -11.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.53 mph (36.25 km/h) |
| 25 mph (40.23 km/h) | 28.16 mph (45.31 km/h) |
| 30 mph (48.28 km/h) | 33.79 mph (54.38 km/h) |
| 35 mph (56.33 km/h) | 39.42 mph (63.44 km/h) |
| 40 mph (64.37 km/h) | 45.05 mph (72.5 km/h) |
| 45 mph (72.42 km/h) | 50.68 mph (81.56 km/h) |
| 50 mph (80.47 km/h) | 56.31 mph (90.63 km/h) |
| 55 mph (88.51 km/h) | 61.94 mph (99.69 km/h) |
| 60 mph (96.56 km/h) | 67.58 mph (108.75 km/h) |
| 65 mph (104.61 km/h) | 73.21 mph (117.82 km/h) |
| 70 mph (112.65 km/h) | 78.84 mph (126.88 km/h) |
| 75 mph (120.7 km/h) | 84.47 mph (135.94 km/h) |
| 80 mph (128.75 km/h) | 90.1 mph (145 km/h) |
| 85 mph (136.79 km/h) | 95.73 mph (154.07 km/h) |
| 90 mph (144.84 km/h) | 101.36 mph (163.13 km/h) |
| 95 mph (152.89 km/h) | 106.99 mph (172.19 km/h) |
| 100 mph (160.93 km/h) | 112.63 mph (181.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1499 | 1741 | 1875 | 1958 | 2047 | 2111 | 2181 | 2264 | 2379 | 2494 | 2622 | 2724 | 2909 | 3113 | 3272 | 3374 | 3432 | 3642 | 3936 | 4573 |
Better Fuel Economy Factory Ratios Increased Power
