Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/55-13 | 185/90-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.01 (533.7) | 26.11 (663.2) | 5.1 (129.5) 24.3% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 66.01 (1676.67) | 82.03 (2083.5) | 16.02 (406.84) 24.3% |
| Sidewall Height inches (mm) | 4.01 (101.75) | 6.56 (166.5) | 2.55 (64.75) 63.6% |
| Revolutions per mile (km) | 959.85 (596.42) | 772.42 (479.96) | -187.42 (-116.46) -19.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.85 mph (40 km/h) |
| 25 mph (40.23 km/h) | 31.07 mph (50 km/h) |
| 30 mph (48.28 km/h) | 37.28 mph (60 km/h) |
| 35 mph (56.33 km/h) | 43.49 mph (69.99 km/h) |
| 40 mph (64.37 km/h) | 49.71 mph (79.99 km/h) |
| 45 mph (72.42 km/h) | 55.92 mph (89.99 km/h) |
| 50 mph (80.47 km/h) | 62.13 mph (99.99 km/h) |
| 55 mph (88.51 km/h) | 68.35 mph (109.99 km/h) |
| 60 mph (96.56 km/h) | 74.56 mph (119.99 km/h) |
| 65 mph (104.61 km/h) | 80.77 mph (129.99 km/h) |
| 70 mph (112.65 km/h) | 86.99 mph (139.99 km/h) |
| 75 mph (120.7 km/h) | 93.2 mph (149.99 km/h) |
| 80 mph (128.75 km/h) | 99.41 mph (159.99 km/h) |
| 85 mph (136.79 km/h) | 105.62 mph (169.99 km/h) |
| 90 mph (144.84 km/h) | 111.84 mph (179.99 km/h) |
| 95 mph (152.89 km/h) | 118.05 mph (189.99 km/h) |
| 100 mph (160.93 km/h) | 124.26 mph (199.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1966 | 2284 | 2459 | 2568 | 2685 | 2769 | 2861 | 2969 | 3120 | 3271 | 3438 | 3572 | 3814 | 4082 | 4291 | 4425 | 4500 | 4776 | 5161 | 5997 |
Better Fuel Economy Factory Ratios Increased Power
