Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 185/65-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.47 (596.1) | 1.76 (44.6) 8.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 73.73 (1872.7) | 5.52 (140.12) 8.1% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.73 (120.25) | 1.38 (35) 41.1% |
| Revolutions per mile (km) | 928.87 (577.17) | 859.37 (533.99) | -69.5 (-43.18) -7.5% |
185/65-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.62 mph (34.79 km/h) |
| 25 mph (40.23 km/h) | 27.02 mph (43.49 km/h) |
| 30 mph (48.28 km/h) | 32.43 mph (52.18 km/h) |
| 35 mph (56.33 km/h) | 37.83 mph (60.88 km/h) |
| 40 mph (64.37 km/h) | 43.23 mph (69.58 km/h) |
| 45 mph (72.42 km/h) | 48.64 mph (78.28 km/h) |
| 50 mph (80.47 km/h) | 54.04 mph (86.97 km/h) |
| 55 mph (88.51 km/h) | 59.45 mph (95.67 km/h) |
| 60 mph (96.56 km/h) | 64.85 mph (104.37 km/h) |
| 65 mph (104.61 km/h) | 70.26 mph (113.07 km/h) |
| 70 mph (112.65 km/h) | 75.66 mph (121.76 km/h) |
| 75 mph (120.7 km/h) | 81.07 mph (130.46 km/h) |
| 80 mph (128.75 km/h) | 86.47 mph (139.16 km/h) |
| 85 mph (136.79 km/h) | 91.87 mph (147.86 km/h) |
| 90 mph (144.84 km/h) | 97.28 mph (156.55 km/h) |
| 95 mph (152.89 km/h) | 102.68 mph (165.25 km/h) |
| 100 mph (160.93 km/h) | 108.09 mph (173.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2187 | 2541 | 2736 | 2857 | 2987 | 3080 | 3183 | 3304 | 3471 | 3639 | 3825 | 3974 | 4244 | 4541 | 4774 | 4923 | 5007 | 5314 | 5742 | 6672 |
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