Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 265/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 33.65 (854.7) | 3.25 (82.5) 10.7% |
| Width inches (mm) | 6.89 (175) | 10.43 (265) | 3.54 (90) 51.4% |
| Circum. inches (mm) | 95.51 (2425.94) | 105.71 (2685.12) | 10.2 (259.18) 10.7% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.82 (198.75) | 1.62 (41.25) 26.2% |
| Revolutions per mile (km) | 663.39 (412.21) | 599.36 (372.42) | -64.03 (-39.79) -9.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.63 km/h) |
| 25 mph (40.23 km/h) | 27.67 mph (44.53 km/h) |
| 30 mph (48.28 km/h) | 33.21 mph (53.44 km/h) |
| 35 mph (56.33 km/h) | 38.74 mph (62.35 km/h) |
| 40 mph (64.37 km/h) | 44.27 mph (71.25 km/h) |
| 45 mph (72.42 km/h) | 49.81 mph (80.16 km/h) |
| 50 mph (80.47 km/h) | 55.34 mph (89.06 km/h) |
| 55 mph (88.51 km/h) | 60.88 mph (97.97 km/h) |
| 60 mph (96.56 km/h) | 66.41 mph (106.88 km/h) |
| 65 mph (104.61 km/h) | 71.94 mph (115.78 km/h) |
| 70 mph (112.65 km/h) | 77.48 mph (124.69 km/h) |
| 75 mph (120.7 km/h) | 83.01 mph (133.6 km/h) |
| 80 mph (128.75 km/h) | 88.55 mph (142.5 km/h) |
| 85 mph (136.79 km/h) | 94.08 mph (151.41 km/h) |
| 90 mph (144.84 km/h) | 99.62 mph (160.32 km/h) |
| 95 mph (152.89 km/h) | 105.15 mph (169.22 km/h) |
| 100 mph (160.93 km/h) | 110.68 mph (178.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1525 | 1772 | 1908 | 1993 | 2083 | 2148 | 2220 | 2304 | 2421 | 2538 | 2668 | 2771 | 2960 | 3167 | 3330 | 3433 | 3492 | 3706 | 4005 | 4654 |
Better Fuel Economy Factory Ratios Increased Power
