Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-16 | 185/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.47 (646.9) | 29.47 (748.5) | 4 (101.6) 15.7% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 80.01 (2032.3) | 92.58 (2351.48) | 12.57 (319.19) 15.7% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 4.73 (120.25) | 0 (0) 0% |
| Revolutions per mile (km) | 791.88 (492.05) | 684.4 (425.26) | -107.49 (-66.79) -13.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.14 mph (37.24 km/h) |
| 25 mph (40.23 km/h) | 28.93 mph (46.55 km/h) |
| 30 mph (48.28 km/h) | 34.71 mph (55.86 km/h) |
| 35 mph (56.33 km/h) | 40.5 mph (65.17 km/h) |
| 40 mph (64.37 km/h) | 46.28 mph (74.48 km/h) |
| 45 mph (72.42 km/h) | 52.07 mph (83.79 km/h) |
| 50 mph (80.47 km/h) | 57.85 mph (93.11 km/h) |
| 55 mph (88.51 km/h) | 63.64 mph (102.42 km/h) |
| 60 mph (96.56 km/h) | 69.42 mph (111.73 km/h) |
| 65 mph (104.61 km/h) | 75.21 mph (121.04 km/h) |
| 70 mph (112.65 km/h) | 80.99 mph (130.35 km/h) |
| 75 mph (120.7 km/h) | 86.78 mph (139.66 km/h) |
| 80 mph (128.75 km/h) | 92.56 mph (148.97 km/h) |
| 85 mph (136.79 km/h) | 98.35 mph (158.28 km/h) |
| 90 mph (144.84 km/h) | 104.14 mph (167.59 km/h) |
| 95 mph (152.89 km/h) | 109.92 mph (176.9 km/h) |
| 100 mph (160.93 km/h) | 115.71 mph (186.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1742 | 2023 | 2179 | 2275 | 2379 | 2453 | 2535 | 2631 | 2764 | 2898 | 3046 | 3165 | 3380 | 3617 | 3802 | 3921 | 3987 | 4232 | 4573 | 5314 |
Better Fuel Economy Factory Ratios Increased Power
