Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/80-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.65 (677) | 24.47 (621.5) | -2.19 (-55.5) -8.2% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 83.73 (2126.86) | 76.87 (1952.5) | -6.86 (-174.36) -8.2% |
| Sidewall Height inches (mm) | 5.83 (148) | 4.73 (120.25) | -1.09 (-27.75) -18.8% |
| Revolutions per mile (km) | 756.68 (470.18) | 824.25 (512.16) | 67.57 (41.99) 8.9% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.36 mph (29.55 km/h) |
| 25 mph (40.23 km/h) | 22.95 mph (36.94 km/h) |
| 30 mph (48.28 km/h) | 27.54 mph (44.32 km/h) |
| 35 mph (56.33 km/h) | 32.13 mph (51.71 km/h) |
| 40 mph (64.37 km/h) | 36.72 mph (59.1 km/h) |
| 45 mph (72.42 km/h) | 41.31 mph (66.48 km/h) |
| 50 mph (80.47 km/h) | 45.9 mph (73.87 km/h) |
| 55 mph (88.51 km/h) | 50.49 mph (81.26 km/h) |
| 60 mph (96.56 km/h) | 55.08 mph (88.64 km/h) |
| 65 mph (104.61 km/h) | 59.67 mph (96.03 km/h) |
| 70 mph (112.65 km/h) | 64.26 mph (103.42 km/h) |
| 75 mph (120.7 km/h) | 68.85 mph (110.81 km/h) |
| 80 mph (128.75 km/h) | 73.44 mph (118.19 km/h) |
| 85 mph (136.79 km/h) | 78.03 mph (125.58 km/h) |
| 90 mph (144.84 km/h) | 82.62 mph (132.97 km/h) |
| 95 mph (152.89 km/h) | 87.21 mph (140.35 km/h) |
| 100 mph (160.93 km/h) | 91.8 mph (147.74 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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