Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-15 | 185/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.47 (621.5) | 25.93 (658.5) | 1.46 (37) 6% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 76.87 (1952.5) | 81.45 (2068.74) | 4.58 (116.24) 6% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 5.46 (138.75) | 0.73 (18.5) 15.4% |
| Revolutions per mile (km) | 824.25 (512.16) | 777.93 (483.39) | -46.31 (-28.78) -5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.19 mph (34.1 km/h) |
| 25 mph (40.23 km/h) | 26.49 mph (42.63 km/h) |
| 30 mph (48.28 km/h) | 31.79 mph (51.15 km/h) |
| 35 mph (56.33 km/h) | 37.08 mph (59.68 km/h) |
| 40 mph (64.37 km/h) | 42.38 mph (68.21 km/h) |
| 45 mph (72.42 km/h) | 47.68 mph (76.73 km/h) |
| 50 mph (80.47 km/h) | 52.98 mph (85.26 km/h) |
| 55 mph (88.51 km/h) | 58.27 mph (93.78 km/h) |
| 60 mph (96.56 km/h) | 63.57 mph (102.31 km/h) |
| 65 mph (104.61 km/h) | 68.87 mph (110.84 km/h) |
| 70 mph (112.65 km/h) | 74.17 mph (119.36 km/h) |
| 75 mph (120.7 km/h) | 79.47 mph (127.89 km/h) |
| 80 mph (128.75 km/h) | 84.76 mph (136.41 km/h) |
| 85 mph (136.79 km/h) | 90.06 mph (144.94 km/h) |
| 90 mph (144.84 km/h) | 95.36 mph (153.46 km/h) |
| 95 mph (152.89 km/h) | 100.66 mph (161.99 km/h) |
| 100 mph (160.93 km/h) | 105.95 mph (170.52 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
