Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/75-15 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.93 (658.5) | 25.2 (640) | -0.73 (-18.5) -2.8% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 81.45 (2068.74) | 79.16 (2010.62) | -2.29 (-58.12) -2.8% |
| Sidewall Height inches (mm) | 5.46 (138.75) | 5.1 (129.5) | -0.36 (-9.25) -6.7% |
| Revolutions per mile (km) | 777.93 (483.39) | 800.42 (497.36) | 22.49 (13.97) 2.9% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.02 mph (54.74 km/h) |
| 40 mph (64.37 km/h) | 38.88 mph (62.57 km/h) |
| 45 mph (72.42 km/h) | 43.74 mph (70.39 km/h) |
| 50 mph (80.47 km/h) | 48.6 mph (78.21 km/h) |
| 55 mph (88.51 km/h) | 53.45 mph (86.03 km/h) |
| 60 mph (96.56 km/h) | 58.31 mph (93.85 km/h) |
| 65 mph (104.61 km/h) | 63.17 mph (101.67 km/h) |
| 70 mph (112.65 km/h) | 68.03 mph (109.49 km/h) |
| 75 mph (120.7 km/h) | 72.89 mph (117.31 km/h) |
| 80 mph (128.75 km/h) | 77.75 mph (125.13 km/h) |
| 85 mph (136.79 km/h) | 82.61 mph (132.95 km/h) |
| 90 mph (144.84 km/h) | 87.47 mph (140.77 km/h) |
| 95 mph (152.89 km/h) | 92.33 mph (148.59 km/h) |
| 100 mph (160.93 km/h) | 97.19 mph (156.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2037 | 2366 | 2548 | 2661 | 2782 | 2869 | 2964 | 3077 | 3233 | 3389 | 3562 | 3701 | 3952 | 4230 | 4447 | 4585 | 4663 | 4949 | 5348 | 6215 |
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