Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-13 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.76 (578.2) | 24.47 (621.5) | 1.7 (43.3) 7.5% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 71.51 (1816.47) | 76.87 (1952.5) | 5.36 (136.03) 7.5% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.73 (120.25) | -0.15 (-3.75) -3% |
| Revolutions per mile (km) | 885.97 (550.52) | 824.25 (512.16) | -61.73 (-38.35) -7% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.6 km/h) |
| 25 mph (40.23 km/h) | 26.87 mph (43.25 km/h) |
| 30 mph (48.28 km/h) | 32.25 mph (51.9 km/h) |
| 35 mph (56.33 km/h) | 37.62 mph (60.55 km/h) |
| 40 mph (64.37 km/h) | 43 mph (69.19 km/h) |
| 45 mph (72.42 km/h) | 48.37 mph (77.84 km/h) |
| 50 mph (80.47 km/h) | 53.74 mph (86.49 km/h) |
| 55 mph (88.51 km/h) | 59.12 mph (95.14 km/h) |
| 60 mph (96.56 km/h) | 64.49 mph (103.79 km/h) |
| 65 mph (104.61 km/h) | 69.87 mph (112.44 km/h) |
| 70 mph (112.65 km/h) | 75.24 mph (121.09 km/h) |
| 75 mph (120.7 km/h) | 80.62 mph (129.74 km/h) |
| 80 mph (128.75 km/h) | 85.99 mph (138.39 km/h) |
| 85 mph (136.79 km/h) | 91.37 mph (147.04 km/h) |
| 90 mph (144.84 km/h) | 96.74 mph (155.69 km/h) |
| 95 mph (152.89 km/h) | 102.11 mph (164.34 km/h) |
| 100 mph (160.93 km/h) | 107.49 mph (172.99 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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