Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/60-20 | 255/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.57 (802) | 33.05 (839.5) | 1.48 (37.5) 4.7% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 99.2 (2519.56) | 103.83 (2637.37) | 4.64 (117.81) 4.7% |
| Sidewall Height inches (mm) | 5.79 (147) | 6.53 (165.75) | 0.74 (18.75) 12.8% |
| Revolutions per mile (km) | 638.74 (396.89) | 610.21 (379.17) | -28.53 (-17.73) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.69 km/h) |
| 25 mph (40.23 km/h) | 26.17 mph (42.11 km/h) |
| 30 mph (48.28 km/h) | 31.4 mph (50.54 km/h) |
| 35 mph (56.33 km/h) | 36.64 mph (58.96 km/h) |
| 40 mph (64.37 km/h) | 41.87 mph (67.38 km/h) |
| 45 mph (72.42 km/h) | 47.1 mph (75.81 km/h) |
| 50 mph (80.47 km/h) | 52.34 mph (84.23 km/h) |
| 55 mph (88.51 km/h) | 57.57 mph (92.65 km/h) |
| 60 mph (96.56 km/h) | 62.81 mph (101.08 km/h) |
| 65 mph (104.61 km/h) | 68.04 mph (109.5 km/h) |
| 70 mph (112.65 km/h) | 73.27 mph (117.92 km/h) |
| 75 mph (120.7 km/h) | 78.51 mph (126.34 km/h) |
| 80 mph (128.75 km/h) | 83.74 mph (134.77 km/h) |
| 85 mph (136.79 km/h) | 88.97 mph (143.19 km/h) |
| 90 mph (144.84 km/h) | 94.21 mph (151.61 km/h) |
| 95 mph (152.89 km/h) | 99.44 mph (160.04 km/h) |
| 100 mph (160.93 km/h) | 104.68 mph (168.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1553 | 1804 | 1943 | 2029 | 2121 | 2187 | 2260 | 2346 | 2465 | 2584 | 2716 | 2822 | 3013 | 3225 | 3390 | 3496 | 3555 | 3773 | 4077 | 4738 |
Better Fuel Economy Factory Ratios Increased Power
