Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/70-15 | 165/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640) | 25.39 (645) | 0.2 (5) 0.8% |
| Width inches (mm) | 7.28 (185) | 6.5 (165) | -0.79 (-20) -10.8% |
| Circum. inches (mm) | 79.16 (2010.62) | 79.78 (2026.33) | 0.62 (15.71) 0.8% |
| Sidewall Height inches (mm) | 5.1 (129.5) | 5.2 (132) | 0.1 (2.5) 1.9% |
| Revolutions per mile (km) | 800.42 (497.36) | 794.22 (493.5) | -6.2 (-3.86) -0.8% |
165/80-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.16 mph (32.44 km/h) |
| 25 mph (40.23 km/h) | 25.2 mph (40.55 km/h) |
| 30 mph (48.28 km/h) | 30.23 mph (48.66 km/h) |
| 35 mph (56.33 km/h) | 35.27 mph (56.77 km/h) |
| 40 mph (64.37 km/h) | 40.31 mph (64.88 km/h) |
| 45 mph (72.42 km/h) | 45.35 mph (72.99 km/h) |
| 50 mph (80.47 km/h) | 50.39 mph (81.1 km/h) |
| 55 mph (88.51 km/h) | 55.43 mph (89.21 km/h) |
| 60 mph (96.56 km/h) | 60.47 mph (97.32 km/h) |
| 65 mph (104.61 km/h) | 65.51 mph (105.42 km/h) |
| 70 mph (112.65 km/h) | 70.55 mph (113.53 km/h) |
| 75 mph (120.7 km/h) | 75.59 mph (121.64 km/h) |
| 80 mph (128.75 km/h) | 80.63 mph (129.75 km/h) |
| 85 mph (136.79 km/h) | 85.66 mph (137.86 km/h) |
| 90 mph (144.84 km/h) | 90.7 mph (145.97 km/h) |
| 95 mph (152.89 km/h) | 95.74 mph (154.08 km/h) |
| 100 mph (160.93 km/h) | 100.78 mph (162.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 2348 | 2529 | 2640 | 2761 | 2847 | 2941 | 3053 | 3208 | 3363 | 3535 | 3672 | 3922 | 4197 | 4412 | 4550 | 4627 | 4911 | 5307 | 6167 |
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