Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/65-17 | 290/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.05 (763.3) | 32.56 (827) | 2.51 (63.7) 8.3% |
| Width inches (mm) | 10.04 (255) | 11.42 (290) | 1.38 (35) 13.7% |
| Circum. inches (mm) | 94.41 (2397.98) | 102.29 (2598.1) | 7.88 (200.12) 8.3% |
| Sidewall Height inches (mm) | 6.53 (165.75) | 6.28 (159.5) | -0.25 (-6.25) -3.8% |
| Revolutions per mile (km) | 671.13 (417.02) | 619.43 (384.9) | -51.69 (-32.12) -7.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.67 mph (34.87 km/h) |
| 25 mph (40.23 km/h) | 27.09 mph (43.59 km/h) |
| 30 mph (48.28 km/h) | 32.5 mph (52.31 km/h) |
| 35 mph (56.33 km/h) | 37.92 mph (61.03 km/h) |
| 40 mph (64.37 km/h) | 43.34 mph (69.75 km/h) |
| 45 mph (72.42 km/h) | 48.76 mph (78.46 km/h) |
| 50 mph (80.47 km/h) | 54.17 mph (87.18 km/h) |
| 55 mph (88.51 km/h) | 59.59 mph (95.9 km/h) |
| 60 mph (96.56 km/h) | 65.01 mph (104.62 km/h) |
| 65 mph (104.61 km/h) | 70.42 mph (113.34 km/h) |
| 70 mph (112.65 km/h) | 75.84 mph (122.06 km/h) |
| 75 mph (120.7 km/h) | 81.26 mph (130.77 km/h) |
| 80 mph (128.75 km/h) | 86.68 mph (139.49 km/h) |
| 85 mph (136.79 km/h) | 92.09 mph (148.21 km/h) |
| 90 mph (144.84 km/h) | 97.51 mph (156.93 km/h) |
| 95 mph (152.89 km/h) | 102.93 mph (165.65 km/h) |
| 100 mph (160.93 km/h) | 108.35 mph (174.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1576 | 1831 | 1972 | 2059 | 2153 | 2220 | 2294 | 2381 | 2502 | 2623 | 2757 | 2864 | 3059 | 3273 | 3441 | 3548 | 3609 | 3830 | 4139 | 4810 |
Better Fuel Economy Factory Ratios Increased Power
