Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/66-17 | 320/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.77 (781.6) | 34.38 (873.2) | 3.61 (91.6) 11.7% |
| Width inches (mm) | 10.43 (265) | 12.6 (320) | 2.17 (55) 20.8% |
| Circum. inches (mm) | 96.67 (2455.47) | 108 (2743.24) | 11.33 (287.77) 11.7% |
| Sidewall Height inches (mm) | 6.89 (174.9) | 8.19 (208) | 1.3 (33.1) 18.9% |
| Revolutions per mile (km) | 655.41 (407.25) | 586.66 (364.53) | -68.75 (-42.72) -10.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.96 km/h) |
| 25 mph (40.23 km/h) | 27.93 mph (44.95 km/h) |
| 30 mph (48.28 km/h) | 33.52 mph (53.94 km/h) |
| 35 mph (56.33 km/h) | 39.1 mph (62.93 km/h) |
| 40 mph (64.37 km/h) | 44.69 mph (71.92 km/h) |
| 45 mph (72.42 km/h) | 50.27 mph (80.91 km/h) |
| 50 mph (80.47 km/h) | 55.86 mph (89.9 km/h) |
| 55 mph (88.51 km/h) | 61.45 mph (98.89 km/h) |
| 60 mph (96.56 km/h) | 67.03 mph (107.88 km/h) |
| 65 mph (104.61 km/h) | 72.62 mph (116.87 km/h) |
| 70 mph (112.65 km/h) | 78.2 mph (125.86 km/h) |
| 75 mph (120.7 km/h) | 83.79 mph (134.85 km/h) |
| 80 mph (128.75 km/h) | 89.38 mph (143.84 km/h) |
| 85 mph (136.79 km/h) | 94.96 mph (152.83 km/h) |
| 90 mph (144.84 km/h) | 100.55 mph (161.82 km/h) |
| 95 mph (152.89 km/h) | 106.13 mph (170.81 km/h) |
| 100 mph (160.93 km/h) | 111.72 mph (179.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1493 | 1734 | 1868 | 1950 | 2039 | 2103 | 2173 | 2255 | 2370 | 2484 | 2611 | 2713 | 2897 | 3100 | 3259 | 3361 | 3418 | 3628 | 3920 | 4555 |
Better Fuel Economy Factory Ratios Increased Power
