Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/65-17 | 318/72-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.56 (776.3) | 38.03 (965.92) | 7.47 (189.62) 24.4% |
| Width inches (mm) | 10.43 (265) | 12.52 (318) | 2.09 (53) 20% |
| Circum. inches (mm) | 96.02 (2438.82) | 119.47 (3034.53) | 23.45 (595.71) 24.4% |
| Sidewall Height inches (mm) | 6.78 (172.25) | 9.01 (228.96) | 2.23 (56.71) 32.9% |
| Revolutions per mile (km) | 659.89 (410.03) | 530.34 (329.54) | -129.54 (-80.49) -19.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.89 mph (40.05 km/h) |
| 25 mph (40.23 km/h) | 31.11 mph (50.06 km/h) |
| 30 mph (48.28 km/h) | 37.33 mph (60.07 km/h) |
| 35 mph (56.33 km/h) | 43.55 mph (70.09 km/h) |
| 40 mph (64.37 km/h) | 49.77 mph (80.1 km/h) |
| 45 mph (72.42 km/h) | 55.99 mph (90.11 km/h) |
| 50 mph (80.47 km/h) | 62.21 mph (100.12 km/h) |
| 55 mph (88.51 km/h) | 68.43 mph (110.13 km/h) |
| 60 mph (96.56 km/h) | 74.66 mph (120.15 km/h) |
| 65 mph (104.61 km/h) | 80.88 mph (130.16 km/h) |
| 70 mph (112.65 km/h) | 87.1 mph (140.17 km/h) |
| 75 mph (120.7 km/h) | 93.32 mph (150.18 km/h) |
| 80 mph (128.75 km/h) | 99.54 mph (160.2 km/h) |
| 85 mph (136.79 km/h) | 105.76 mph (170.21 km/h) |
| 90 mph (144.84 km/h) | 111.98 mph (180.22 km/h) |
| 95 mph (152.89 km/h) | 118.2 mph (190.23 km/h) |
| 100 mph (160.93 km/h) | 124.43 mph (200.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1350 | 1568 | 1688 | 1763 | 1844 | 1901 | 1964 | 2039 | 2142 | 2246 | 2360 | 2452 | 2619 | 2803 | 2946 | 3038 | 3090 | 3279 | 3543 | 4118 |
Better Fuel Economy Factory Ratios Increased Power
