Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/85-14 | 185/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.38 (670.1) | 25.93 (658.5) | -0.46 (-11.6) -1.7% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 82.88 (2105.18) | 81.45 (2068.74) | -1.43 (-36.44) -1.7% |
| Sidewall Height inches (mm) | 6.19 (157.25) | 5.46 (138.75) | -0.73 (-18.5) -11.8% |
| Revolutions per mile (km) | 764.47 (475.02) | 777.93 (483.39) | 13.47 (8.37) 1.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.63 km/h) |
| 25 mph (40.23 km/h) | 24.57 mph (39.54 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.44 km/h) |
| 35 mph (56.33 km/h) | 34.39 mph (55.35 km/h) |
| 40 mph (64.37 km/h) | 39.31 mph (63.26 km/h) |
| 45 mph (72.42 km/h) | 44.22 mph (71.17 km/h) |
| 50 mph (80.47 km/h) | 49.13 mph (79.07 km/h) |
| 55 mph (88.51 km/h) | 54.05 mph (86.98 km/h) |
| 60 mph (96.56 km/h) | 58.96 mph (94.89 km/h) |
| 65 mph (104.61 km/h) | 63.87 mph (102.8 km/h) |
| 70 mph (112.65 km/h) | 68.79 mph (110.7 km/h) |
| 75 mph (120.7 km/h) | 73.7 mph (118.61 km/h) |
| 80 mph (128.75 km/h) | 78.62 mph (126.52 km/h) |
| 85 mph (136.79 km/h) | 83.53 mph (134.43 km/h) |
| 90 mph (144.84 km/h) | 88.44 mph (142.33 km/h) |
| 95 mph (152.89 km/h) | 93.36 mph (150.24 km/h) |
| 100 mph (160.93 km/h) | 98.27 mph (158.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | 2300 | 2477 | 2586 | 2704 | 2788 | 2881 | 2991 | 3142 | 3294 | 3462 | 3597 | 3841 | 4111 | 4322 | 4456 | 4532 | 4810 | 5198 | 6040 |
Better Fuel Economy Factory Ratios Increased Power
