Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 90/90-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 18.38 (466.8) | -3.27 (-83) -15.1% |
| Width inches (mm) | 6.89 (175) | 3.54 (90) | -3.35 (-85) -48.6% |
| Circum. inches (mm) | 68 (1727.25) | 57.74 (1466.5) | -10.27 (-260.75) -15.1% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 3.19 (81) | -1.63 (-41.5) -33.9% |
| Revolutions per mile (km) | 931.74 (578.95) | 1097.41 (681.9) | 165.67 (102.94) 17.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.98 mph (27.33 km/h) |
| 25 mph (40.23 km/h) | 21.23 mph (34.16 km/h) |
| 30 mph (48.28 km/h) | 25.47 mph (40.99 km/h) |
| 35 mph (56.33 km/h) | 29.72 mph (47.82 km/h) |
| 40 mph (64.37 km/h) | 33.96 mph (54.66 km/h) |
| 45 mph (72.42 km/h) | 38.21 mph (61.49 km/h) |
| 50 mph (80.47 km/h) | 42.45 mph (68.32 km/h) |
| 55 mph (88.51 km/h) | 46.7 mph (75.15 km/h) |
| 60 mph (96.56 km/h) | 50.94 mph (81.98 km/h) |
| 65 mph (104.61 km/h) | 55.19 mph (88.82 km/h) |
| 70 mph (112.65 km/h) | 59.43 mph (95.65 km/h) |
| 75 mph (120.7 km/h) | 63.68 mph (102.48 km/h) |
| 80 mph (128.75 km/h) | 67.92 mph (109.31 km/h) |
| 85 mph (136.79 km/h) | 72.17 mph (116.14 km/h) |
| 90 mph (144.84 km/h) | 76.41 mph (122.98 km/h) |
| 95 mph (152.89 km/h) | 80.66 mph (129.81 km/h) |
| 100 mph (160.93 km/h) | 84.9 mph (136.64 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
