Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-13 | 180/90-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.34 (618.2) | 25.76 (654.2) | 1.42 (36) 5.8% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 76.46 (1942.13) | 80.91 (2055.23) | 4.45 (113.1) 5.8% |
| Sidewall Height inches (mm) | 5.67 (144) | 6.38 (162) | 0.71 (18) 12.5% |
| Revolutions per mile (km) | 828.65 (514.9) | 783.05 (486.56) | -45.6 (-28.33) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.16 mph (34.06 km/h) |
| 25 mph (40.23 km/h) | 26.46 mph (42.58 km/h) |
| 30 mph (48.28 km/h) | 31.75 mph (51.09 km/h) |
| 35 mph (56.33 km/h) | 37.04 mph (59.61 km/h) |
| 40 mph (64.37 km/h) | 42.33 mph (68.12 km/h) |
| 45 mph (72.42 km/h) | 47.62 mph (76.64 km/h) |
| 50 mph (80.47 km/h) | 52.91 mph (85.15 km/h) |
| 55 mph (88.51 km/h) | 58.2 mph (93.67 km/h) |
| 60 mph (96.56 km/h) | 63.49 mph (102.18 km/h) |
| 65 mph (104.61 km/h) | 68.79 mph (110.7 km/h) |
| 70 mph (112.65 km/h) | 74.08 mph (119.21 km/h) |
| 75 mph (120.7 km/h) | 79.37 mph (127.73 km/h) |
| 80 mph (128.75 km/h) | 84.66 mph (136.25 km/h) |
| 85 mph (136.79 km/h) | 89.95 mph (144.76 km/h) |
| 90 mph (144.84 km/h) | 95.24 mph (153.28 km/h) |
| 95 mph (152.89 km/h) | 100.53 mph (161.79 km/h) |
| 100 mph (160.93 km/h) | 105.82 mph (170.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 2315 | 2493 | 2603 | 2722 | 2807 | 2900 | 3010 | 3163 | 3316 | 3485 | 3621 | 3867 | 4138 | 4350 | 4486 | 4562 | 4842 | 5232 | 6080 |
Better Fuel Economy Factory Ratios Increased Power
