Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/75-15 | 185/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.74 (628.5) | 25.2 (640) | 0.45 (11.5) 1.8% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 77.74 (1974.49) | 79.16 (2010.62) | 1.42 (36.13) 1.8% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.1 (129.5) | 0.23 (5.75) 4.6% |
| Revolutions per mile (km) | 815.07 (506.46) | 800.42 (497.36) | -14.65 (-9.1) -1.8% |
185/70-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.37 mph (32.78 km/h) |
| 25 mph (40.23 km/h) | 25.46 mph (40.97 km/h) |
| 30 mph (48.28 km/h) | 30.55 mph (49.16 km/h) |
| 35 mph (56.33 km/h) | 35.64 mph (57.36 km/h) |
| 40 mph (64.37 km/h) | 40.73 mph (65.55 km/h) |
| 45 mph (72.42 km/h) | 45.82 mph (73.75 km/h) |
| 50 mph (80.47 km/h) | 50.91 mph (81.94 km/h) |
| 55 mph (88.51 km/h) | 56.01 mph (90.13 km/h) |
| 60 mph (96.56 km/h) | 61.1 mph (98.33 km/h) |
| 65 mph (104.61 km/h) | 66.19 mph (106.52 km/h) |
| 70 mph (112.65 km/h) | 71.28 mph (114.72 km/h) |
| 75 mph (120.7 km/h) | 76.37 mph (122.91 km/h) |
| 80 mph (128.75 km/h) | 81.46 mph (131.1 km/h) |
| 85 mph (136.79 km/h) | 86.56 mph (139.3 km/h) |
| 90 mph (144.84 km/h) | 91.65 mph (147.49 km/h) |
| 95 mph (152.89 km/h) | 96.74 mph (155.69 km/h) |
| 100 mph (160.93 km/h) | 101.83 mph (163.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2037 | 2366 | 2548 | 2661 | 2782 | 2869 | 2964 | 3077 | 3233 | 3389 | 3562 | 3701 | 3952 | 4230 | 4447 | 4585 | 4663 | 4949 | 5348 | 6215 |
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