Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/70-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640) | 24.47 (621.5) | -0.73 (-18.5) -2.9% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 79.16 (2010.62) | 76.87 (1952.5) | -2.29 (-58.12) -2.9% |
| Sidewall Height inches (mm) | 5.1 (129.5) | 4.73 (120.25) | -0.36 (-9.25) -7.1% |
| Revolutions per mile (km) | 800.42 (497.36) | 824.25 (512.16) | 23.83 (14.8) 3% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.26 km/h) |
| 25 mph (40.23 km/h) | 24.28 mph (39.07 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.88 km/h) |
| 35 mph (56.33 km/h) | 33.99 mph (54.7 km/h) |
| 40 mph (64.37 km/h) | 38.84 mph (62.51 km/h) |
| 45 mph (72.42 km/h) | 43.7 mph (70.33 km/h) |
| 50 mph (80.47 km/h) | 48.55 mph (78.14 km/h) |
| 55 mph (88.51 km/h) | 53.41 mph (85.96 km/h) |
| 60 mph (96.56 km/h) | 58.27 mph (93.77 km/h) |
| 65 mph (104.61 km/h) | 63.12 mph (101.58 km/h) |
| 70 mph (112.65 km/h) | 67.98 mph (109.4 km/h) |
| 75 mph (120.7 km/h) | 72.83 mph (117.21 km/h) |
| 80 mph (128.75 km/h) | 77.69 mph (125.03 km/h) |
| 85 mph (136.79 km/h) | 82.54 mph (132.84 km/h) |
| 90 mph (144.84 km/h) | 87.4 mph (140.65 km/h) |
| 95 mph (152.89 km/h) | 92.25 mph (148.47 km/h) |
| 100 mph (160.93 km/h) | 97.11 mph (156.28 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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