| 摘要 |
<p>The two outer ends of the axle (60) of the rear wheel have an outer thread (63) and are of different diameters. The wheel hub (50) rotates around the axle (60) and is secured with a locking screw (600) attached to the wider segment (63). A freewheel mechanism (70) with two roller bearings is attached to the narrow segment (64) and secured with an auxiliary threaded element (90) at one end and with a sleeve accommodating the narrow segment (64).</p> |
