Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.58 (573.5) | 24.47 (621.5) | 1.89 (48) 8.4% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 70.93 (1801.7) | 76.87 (1952.5) | 5.94 (150.8) 8.4% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.73 (120.25) | 0.94 (24) 24.9% |
| Revolutions per mile (km) | 893.23 (555.03) | 824.25 (512.16) | -68.99 (-42.87) -7.7% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.67 mph (34.88 km/h) |
| 25 mph (40.23 km/h) | 27.09 mph (43.6 km/h) |
| 30 mph (48.28 km/h) | 32.51 mph (52.32 km/h) |
| 35 mph (56.33 km/h) | 37.93 mph (61.04 km/h) |
| 40 mph (64.37 km/h) | 43.35 mph (69.76 km/h) |
| 45 mph (72.42 km/h) | 48.77 mph (78.48 km/h) |
| 50 mph (80.47 km/h) | 54.18 mph (87.2 km/h) |
| 55 mph (88.51 km/h) | 59.6 mph (95.92 km/h) |
| 60 mph (96.56 km/h) | 65.02 mph (104.64 km/h) |
| 65 mph (104.61 km/h) | 70.44 mph (113.36 km/h) |
| 70 mph (112.65 km/h) | 75.86 mph (122.08 km/h) |
| 75 mph (120.7 km/h) | 81.28 mph (130.8 km/h) |
| 80 mph (128.75 km/h) | 86.7 mph (139.52 km/h) |
| 85 mph (136.79 km/h) | 92.11 mph (148.24 km/h) |
| 90 mph (144.84 km/h) | 97.53 mph (156.96 km/h) |
| 95 mph (152.89 km/h) | 102.95 mph (165.68 km/h) |
| 100 mph (160.93 km/h) | 108.37 mph (174.4 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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