Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-13 | 185/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.34 (618.2) | 24.65 (626.2) | 0.31 (8) 1.3% |
| Width inches (mm) | 7.09 (180) | 7.28 (185) | 0.2 (5) 2.8% |
| Circum. inches (mm) | 76.46 (1942.13) | 77.45 (1967.27) | 0.99 (25.13) 1.3% |
| Sidewall Height inches (mm) | 5.67 (144) | 5.83 (148) | 0.16 (4) 2.8% |
| Revolutions per mile (km) | 828.65 (514.9) | 818.06 (508.32) | -10.59 (-6.58) -1.3% |
185/80-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.26 mph (32.6 km/h) |
| 25 mph (40.23 km/h) | 25.32 mph (40.75 km/h) |
| 30 mph (48.28 km/h) | 30.39 mph (48.91 km/h) |
| 35 mph (56.33 km/h) | 35.45 mph (57.06 km/h) |
| 40 mph (64.37 km/h) | 40.52 mph (65.21 km/h) |
| 45 mph (72.42 km/h) | 45.58 mph (73.36 km/h) |
| 50 mph (80.47 km/h) | 50.65 mph (81.51 km/h) |
| 55 mph (88.51 km/h) | 55.71 mph (89.66 km/h) |
| 60 mph (96.56 km/h) | 60.78 mph (97.81 km/h) |
| 65 mph (104.61 km/h) | 65.84 mph (105.96 km/h) |
| 70 mph (112.65 km/h) | 70.91 mph (114.11 km/h) |
| 75 mph (120.7 km/h) | 75.97 mph (122.26 km/h) |
| 80 mph (128.75 km/h) | 81.04 mph (130.41 km/h) |
| 85 mph (136.79 km/h) | 86.1 mph (138.56 km/h) |
| 90 mph (144.84 km/h) | 91.16 mph (146.72 km/h) |
| 95 mph (152.89 km/h) | 96.23 mph (154.87 km/h) |
| 100 mph (160.93 km/h) | 101.29 mph (163.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2082 | 2418 | 2604 | 2720 | 2844 | 2932 | 3030 | 3145 | 3304 | 3464 | 3641 | 3783 | 4040 | 4323 | 4545 | 4686 | 4766 | 5058 | 5466 | 6352 |
Better Fuel Economy Factory Ratios Increased Power
