Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/60-13 | 185/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.74 (552.2) | 24.65 (626.2) | 2.91 (74) 13.4% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 68.3 (1734.79) | 77.45 (1967.27) | 9.15 (232.48) 13.4% |
| Sidewall Height inches (mm) | 4.37 (111) | 5.83 (148) | 1.46 (37) 33.3% |
| Revolutions per mile (km) | 927.69 (576.44) | 818.06 (508.32) | -109.63 (-68.12) -11.8% |
185/80-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.68 mph (36.5 km/h) |
| 25 mph (40.23 km/h) | 28.35 mph (45.63 km/h) |
| 30 mph (48.28 km/h) | 34.02 mph (54.75 km/h) |
| 35 mph (56.33 km/h) | 39.69 mph (63.88 km/h) |
| 40 mph (64.37 km/h) | 45.36 mph (73 km/h) |
| 45 mph (72.42 km/h) | 51.03 mph (82.13 km/h) |
| 50 mph (80.47 km/h) | 56.7 mph (91.25 km/h) |
| 55 mph (88.51 km/h) | 62.37 mph (100.38 km/h) |
| 60 mph (96.56 km/h) | 68.04 mph (109.5 km/h) |
| 65 mph (104.61 km/h) | 73.71 mph (118.63 km/h) |
| 70 mph (112.65 km/h) | 79.38 mph (127.75 km/h) |
| 75 mph (120.7 km/h) | 85.05 mph (136.88 km/h) |
| 80 mph (128.75 km/h) | 90.72 mph (146 km/h) |
| 85 mph (136.79 km/h) | 96.39 mph (155.13 km/h) |
| 90 mph (144.84 km/h) | 102.06 mph (164.25 km/h) |
| 95 mph (152.89 km/h) | 107.73 mph (173.38 km/h) |
| 100 mph (160.93 km/h) | 113.4 mph (182.5 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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