Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-13 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.47 (570.7) | 24.47 (621.5) | 2 (50.8) 8.9% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 70.59 (1792.91) | 76.87 (1952.5) | 6.28 (159.59) 8.9% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 4.73 (120.25) | 0 (0) 0% |
| Revolutions per mile (km) | 897.62 (557.75) | 824.25 (512.16) | -73.37 (-45.59) -8.2% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.78 mph (35.05 km/h) |
| 25 mph (40.23 km/h) | 27.23 mph (43.82 km/h) |
| 30 mph (48.28 km/h) | 32.67 mph (52.58 km/h) |
| 35 mph (56.33 km/h) | 38.12 mph (61.34 km/h) |
| 40 mph (64.37 km/h) | 43.56 mph (70.1 km/h) |
| 45 mph (72.42 km/h) | 49.01 mph (78.87 km/h) |
| 50 mph (80.47 km/h) | 54.45 mph (87.63 km/h) |
| 55 mph (88.51 km/h) | 59.9 mph (96.39 km/h) |
| 60 mph (96.56 km/h) | 65.34 mph (105.16 km/h) |
| 65 mph (104.61 km/h) | 70.79 mph (113.92 km/h) |
| 70 mph (112.65 km/h) | 76.23 mph (122.68 km/h) |
| 75 mph (120.7 km/h) | 81.68 mph (131.45 km/h) |
| 80 mph (128.75 km/h) | 87.12 mph (140.21 km/h) |
| 85 mph (136.79 km/h) | 92.57 mph (148.97 km/h) |
| 90 mph (144.84 km/h) | 98.01 mph (157.73 km/h) |
| 95 mph (152.89 km/h) | 103.46 mph (166.5 km/h) |
| 100 mph (160.93 km/h) | 108.9 mph (175.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2098 | 2437 | 2624 | 2740 | 2865 | 2954 | 3053 | 3169 | 3329 | 3490 | 3668 | 3811 | 4070 | 4356 | 4579 | 4722 | 4802 | 5097 | 5507 | 6400 |
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