Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 26/12-12 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.93 (658.6) | 25.2 (640) | -0.73 (-18.6) -2.8% |
| Width inches (mm) | 12.01 (305) | 7.28 (185) | -4.72 (-120) -39.3% |
| Circum. inches (mm) | 81.46 (2069.05) | 79.16 (2010.62) | -2.3 (-58.43) -2.8% |
| Sidewall Height inches (mm) | 6.96 (176.9) | 5.1 (129.5) | -1.87 (-47.4) -26.8% |
| Revolutions per mile (km) | 777.82 (483.31) | 800.42 (497.36) | 22.61 (14.05) 2.9% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.29 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.15 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.74 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.56 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.38 km/h) |
| 50 mph (80.47 km/h) | 48.59 mph (78.19 km/h) |
| 55 mph (88.51 km/h) | 53.45 mph (86.01 km/h) |
| 60 mph (96.56 km/h) | 58.31 mph (93.83 km/h) |
| 65 mph (104.61 km/h) | 63.16 mph (101.65 km/h) |
| 70 mph (112.65 km/h) | 68.02 mph (109.47 km/h) |
| 75 mph (120.7 km/h) | 72.88 mph (117.29 km/h) |
| 80 mph (128.75 km/h) | 77.74 mph (125.11 km/h) |
| 85 mph (136.79 km/h) | 82.6 mph (132.93 km/h) |
| 90 mph (144.84 km/h) | 87.46 mph (140.75 km/h) |
| 95 mph (152.89 km/h) | 92.32 mph (148.57 km/h) |
| 100 mph (160.93 km/h) | 97.18 mph (156.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2037 | 2366 | 2548 | 2661 | 2782 | 2869 | 2964 | 3077 | 3233 | 3389 | 3562 | 3701 | 3952 | 4230 | 4447 | 4585 | 4663 | 4949 | 5348 | 6215 |
Better Fuel Economy Factory Ratios Increased Power
