Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/60-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.27 (591) | 24.47 (621.5) | 1.2 (30.5) 5.2% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 73.1 (1856.68) | 76.87 (1952.5) | 3.77 (95.82) 5.2% |
| Sidewall Height inches (mm) | 4.13 (105) | 4.73 (120.25) | 0.6 (15.25) 14.5% |
| Revolutions per mile (km) | 866.79 (538.59) | 824.25 (512.16) | -42.54 (-26.43) -4.9% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.31 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.77 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.23 km/h) |
| 40 mph (64.37 km/h) | 42.06 mph (67.7 km/h) |
| 45 mph (72.42 km/h) | 47.32 mph (76.16 km/h) |
| 50 mph (80.47 km/h) | 52.58 mph (84.62 km/h) |
| 55 mph (88.51 km/h) | 57.84 mph (93.08 km/h) |
| 60 mph (96.56 km/h) | 63.1 mph (101.54 km/h) |
| 65 mph (104.61 km/h) | 68.35 mph (110.01 km/h) |
| 70 mph (112.65 km/h) | 73.61 mph (118.47 km/h) |
| 75 mph (120.7 km/h) | 78.87 mph (126.93 km/h) |
| 80 mph (128.75 km/h) | 84.13 mph (135.39 km/h) |
| 85 mph (136.79 km/h) | 89.39 mph (143.85 km/h) |
| 90 mph (144.84 km/h) | 94.64 mph (152.32 km/h) |
| 95 mph (152.89 km/h) | 99.9 mph (160.78 km/h) |
| 100 mph (160.93 km/h) | 105.16 mph (169.24 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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