Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/65-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.42 (569.5) | 24.47 (621.5) | 2.05 (52) 9.1% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 70.44 (1789.14) | 76.87 (1952.5) | 6.43 (163.36) 9.1% |
| Sidewall Height inches (mm) | 3.71 (94.25) | 4.73 (120.25) | 1.02 (26) 27.6% |
| Revolutions per mile (km) | 899.51 (558.93) | 824.25 (512.16) | -75.26 (-46.76) -8.4% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.83 mph (35.13 km/h) |
| 25 mph (40.23 km/h) | 27.28 mph (43.91 km/h) |
| 30 mph (48.28 km/h) | 32.74 mph (52.69 km/h) |
| 35 mph (56.33 km/h) | 38.2 mph (61.47 km/h) |
| 40 mph (64.37 km/h) | 43.65 mph (70.25 km/h) |
| 45 mph (72.42 km/h) | 49.11 mph (79.03 km/h) |
| 50 mph (80.47 km/h) | 54.57 mph (87.81 km/h) |
| 55 mph (88.51 km/h) | 60.02 mph (96.6 km/h) |
| 60 mph (96.56 km/h) | 65.48 mph (105.38 km/h) |
| 65 mph (104.61 km/h) | 70.94 mph (114.16 km/h) |
| 70 mph (112.65 km/h) | 76.39 mph (122.94 km/h) |
| 75 mph (120.7 km/h) | 81.85 mph (131.72 km/h) |
| 80 mph (128.75 km/h) | 87.3 mph (140.5 km/h) |
| 85 mph (136.79 km/h) | 92.76 mph (149.28 km/h) |
| 90 mph (144.84 km/h) | 98.22 mph (158.07 km/h) |
| 95 mph (152.89 km/h) | 103.67 mph (166.85 km/h) |
| 100 mph (160.93 km/h) | 109.13 mph (175.63 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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