Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-14 | 185/65-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.09 (535.6) | 23.47 (596.1) | 2.38 (60.5) 11.3% |
| Width inches (mm) | 8.86 (225) | 7.28 (185) | -1.57 (-40) -17.8% |
| Circum. inches (mm) | 66.25 (1682.64) | 73.73 (1872.7) | 7.48 (190.07) 11.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 4.73 (120.25) | 1.19 (30.25) 33.6% |
| Revolutions per mile (km) | 956.44 (594.3) | 859.37 (533.99) | -97.07 (-60.32) -10.1% |
185/65-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.26 mph (35.82 km/h) |
| 25 mph (40.23 km/h) | 27.82 mph (44.78 km/h) |
| 30 mph (48.28 km/h) | 33.39 mph (53.73 km/h) |
| 35 mph (56.33 km/h) | 38.95 mph (62.69 km/h) |
| 40 mph (64.37 km/h) | 44.52 mph (71.65 km/h) |
| 45 mph (72.42 km/h) | 50.08 mph (80.6 km/h) |
| 50 mph (80.47 km/h) | 55.65 mph (89.56 km/h) |
| 55 mph (88.51 km/h) | 61.21 mph (98.51 km/h) |
| 60 mph (96.56 km/h) | 66.78 mph (107.47 km/h) |
| 65 mph (104.61 km/h) | 72.34 mph (116.42 km/h) |
| 70 mph (112.65 km/h) | 77.91 mph (125.38 km/h) |
| 75 mph (120.7 km/h) | 83.47 mph (134.34 km/h) |
| 80 mph (128.75 km/h) | 89.04 mph (143.29 km/h) |
| 85 mph (136.79 km/h) | 94.6 mph (152.25 km/h) |
| 90 mph (144.84 km/h) | 100.17 mph (161.2 km/h) |
| 95 mph (152.89 km/h) | 105.73 mph (170.16 km/h) |
| 100 mph (160.93 km/h) | 111.3 mph (179.11 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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