Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.13 (613) | 24.47 (621.5) | 0.33 (8.5) 1.4% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 75.82 (1925.8) | 76.87 (1952.5) | 1.05 (26.7) 1.4% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.73 (120.25) | 0.17 (4.25) 3.7% |
| Revolutions per mile (km) | 835.68 (519.26) | 824.25 (512.16) | -11.43 (-7.1) -1.4% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.28 mph (32.63 km/h) |
| 25 mph (40.23 km/h) | 25.35 mph (40.79 km/h) |
| 30 mph (48.28 km/h) | 30.42 mph (48.95 km/h) |
| 35 mph (56.33 km/h) | 35.49 mph (57.11 km/h) |
| 40 mph (64.37 km/h) | 40.55 mph (65.27 km/h) |
| 45 mph (72.42 km/h) | 45.62 mph (73.42 km/h) |
| 50 mph (80.47 km/h) | 50.69 mph (81.58 km/h) |
| 55 mph (88.51 km/h) | 55.76 mph (89.74 km/h) |
| 60 mph (96.56 km/h) | 60.83 mph (97.9 km/h) |
| 65 mph (104.61 km/h) | 65.9 mph (106.06 km/h) |
| 70 mph (112.65 km/h) | 70.97 mph (114.22 km/h) |
| 75 mph (120.7 km/h) | 76.04 mph (122.37 km/h) |
| 80 mph (128.75 km/h) | 81.11 mph (130.53 km/h) |
| 85 mph (136.79 km/h) | 86.18 mph (138.69 km/h) |
| 90 mph (144.84 km/h) | 91.25 mph (146.85 km/h) |
| 95 mph (152.89 km/h) | 96.32 mph (155.01 km/h) |
| 100 mph (160.93 km/h) | 101.39 mph (163.17 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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