Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.15 (562.5) | 24.47 (621.5) | 2.32 (59) 10.5% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 69.57 (1767.15) | 76.87 (1952.5) | 7.3 (185.35) 10.5% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.73 (120.25) | 1.16 (29.5) 32.5% |
| Revolutions per mile (km) | 910.7 (565.88) | 824.25 (512.16) | -86.45 (-53.72) -9.5% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.1 mph (35.56 km/h) |
| 25 mph (40.23 km/h) | 27.62 mph (44.45 km/h) |
| 30 mph (48.28 km/h) | 33.15 mph (53.34 km/h) |
| 35 mph (56.33 km/h) | 38.67 mph (62.24 km/h) |
| 40 mph (64.37 km/h) | 44.2 mph (71.13 km/h) |
| 45 mph (72.42 km/h) | 49.72 mph (80.02 km/h) |
| 50 mph (80.47 km/h) | 55.24 mph (88.91 km/h) |
| 55 mph (88.51 km/h) | 60.77 mph (97.8 km/h) |
| 60 mph (96.56 km/h) | 66.29 mph (106.69 km/h) |
| 65 mph (104.61 km/h) | 71.82 mph (115.58 km/h) |
| 70 mph (112.65 km/h) | 77.34 mph (124.47 km/h) |
| 75 mph (120.7 km/h) | 82.87 mph (133.36 km/h) |
| 80 mph (128.75 km/h) | 88.39 mph (142.25 km/h) |
| 85 mph (136.79 km/h) | 93.92 mph (151.14 km/h) |
| 90 mph (144.84 km/h) | 99.44 mph (160.03 km/h) |
| 95 mph (152.89 km/h) | 104.96 mph (168.92 km/h) |
| 100 mph (160.93 km/h) | 110.49 mph (177.81 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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