Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 400/60-15.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 34.4 (873.7) | 12.75 (323.9) 58.9% |
| Width inches (mm) | 6.89 (175) | 15.75 (400) | 8.86 (225) 128.6% |
| Circum. inches (mm) | 68 (1727.25) | 108.06 (2744.81) | 40.06 (1017.56) 58.9% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 9.45 (240) | 4.63 (117.5) 95.9% |
| Revolutions per mile (km) | 931.74 (578.95) | 586.32 (364.32) | -345.42 (-214.63) -37.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 31.78 mph (51.15 km/h) |
| 25 mph (40.23 km/h) | 39.73 mph (63.94 km/h) |
| 30 mph (48.28 km/h) | 47.67 mph (76.72 km/h) |
| 35 mph (56.33 km/h) | 55.62 mph (89.51 km/h) |
| 40 mph (64.37 km/h) | 63.56 mph (102.3 km/h) |
| 45 mph (72.42 km/h) | 71.51 mph (115.09 km/h) |
| 50 mph (80.47 km/h) | 79.46 mph (127.87 km/h) |
| 55 mph (88.51 km/h) | 87.4 mph (140.66 km/h) |
| 60 mph (96.56 km/h) | 95.35 mph (153.45 km/h) |
| 65 mph (104.61 km/h) | 103.29 mph (166.23 km/h) |
| 70 mph (112.65 km/h) | 111.24 mph (179.02 km/h) |
| 75 mph (120.7 km/h) | 119.18 mph (191.81 km/h) |
| 80 mph (128.75 km/h) | 127.13 mph (204.6 km/h) |
| 85 mph (136.79 km/h) | 135.08 mph (217.38 km/h) |
| 90 mph (144.84 km/h) | 143.02 mph (230.17 km/h) |
| 95 mph (152.89 km/h) | 150.97 mph (242.96 km/h) |
| 100 mph (160.93 km/h) | 158.91 mph (255.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1492 | 1733 | 1867 | 1949 | 2038 | 2102 | 2171 | 2254 | 2368 | 2483 | 2610 | 2711 | 2895 | 3098 | 3257 | 3359 | 3416 | 3625 | 3918 | 4552 |
Better Fuel Economy Factory Ratios Increased Power
