Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 185/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 24.65 (626.2) | -0.69 (-17.4) -2.7% |
| Width inches (mm) | 7.09 (180) | 7.28 (185) | 0.2 (5) 2.8% |
| Circum. inches (mm) | 79.6 (2021.93) | 77.45 (1967.27) | -2.15 (-54.66) -2.7% |
| Sidewall Height inches (mm) | 5.67 (144) | 5.83 (148) | 0.16 (4) 2.8% |
| Revolutions per mile (km) | 795.94 (494.58) | 818.06 (508.32) | 22.12 (13.74) 2.8% |
185/80-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.32 km/h) |
| 25 mph (40.23 km/h) | 24.32 mph (39.15 km/h) |
| 30 mph (48.28 km/h) | 29.19 mph (46.98 km/h) |
| 35 mph (56.33 km/h) | 34.05 mph (54.8 km/h) |
| 40 mph (64.37 km/h) | 38.92 mph (62.63 km/h) |
| 45 mph (72.42 km/h) | 43.78 mph (70.46 km/h) |
| 50 mph (80.47 km/h) | 48.65 mph (78.29 km/h) |
| 55 mph (88.51 km/h) | 53.51 mph (86.12 km/h) |
| 60 mph (96.56 km/h) | 58.38 mph (93.95 km/h) |
| 65 mph (104.61 km/h) | 63.24 mph (101.78 km/h) |
| 70 mph (112.65 km/h) | 68.11 mph (109.61 km/h) |
| 75 mph (120.7 km/h) | 72.97 mph (117.44 km/h) |
| 80 mph (128.75 km/h) | 77.84 mph (125.27 km/h) |
| 85 mph (136.79 km/h) | 82.7 mph (133.1 km/h) |
| 90 mph (144.84 km/h) | 87.57 mph (140.93 km/h) |
| 95 mph (152.89 km/h) | 92.43 mph (148.75 km/h) |
| 100 mph (160.93 km/h) | 97.3 mph (156.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2082 | 2418 | 2604 | 2720 | 2844 | 2932 | 3030 | 3145 | 3304 | 3464 | 3641 | 3783 | 4040 | 4323 | 4545 | 4686 | 4766 | 5058 | 5466 | 6352 |
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