Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 170/30-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 16.02 (406.8) | -8.35 (-212) -34.3% |
| Width inches (mm) | 6.69 (170) | 6.69 (170) | 0 (0) 0% |
| Circum. inches (mm) | 76.54 (1944.02) | 50.31 (1278) | -26.22 (-666.02) -34.3% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 2.01 (51) | -1.67 (-42.5) -45.5% |
| Revolutions per mile (km) | 827.84 (514.4) | 1259.27 (782.47) | 431.42 (268.07) 52.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 13.15 mph (21.16 km/h) |
| 25 mph (40.23 km/h) | 16.44 mph (26.45 km/h) |
| 30 mph (48.28 km/h) | 19.72 mph (31.74 km/h) |
| 35 mph (56.33 km/h) | 23.01 mph (37.03 km/h) |
| 40 mph (64.37 km/h) | 26.3 mph (42.32 km/h) |
| 45 mph (72.42 km/h) | 29.58 mph (47.61 km/h) |
| 50 mph (80.47 km/h) | 32.87 mph (52.9 km/h) |
| 55 mph (88.51 km/h) | 36.16 mph (58.19 km/h) |
| 60 mph (96.56 km/h) | 39.44 mph (63.48 km/h) |
| 65 mph (104.61 km/h) | 42.73 mph (68.77 km/h) |
| 70 mph (112.65 km/h) | 46.02 mph (74.06 km/h) |
| 75 mph (120.7 km/h) | 49.31 mph (79.35 km/h) |
| 80 mph (128.75 km/h) | 52.59 mph (84.64 km/h) |
| 85 mph (136.79 km/h) | 55.88 mph (89.93 km/h) |
| 90 mph (144.84 km/h) | 59.17 mph (95.22 km/h) |
| 95 mph (152.89 km/h) | 62.45 mph (100.51 km/h) |
| 100 mph (160.93 km/h) | 65.74 mph (105.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
