| 摘要 |
<p>The 'Annushka' bicycle is intended for racing or leisure cycling in different conditions, and allows automatic multi-step gear change without any need to shift the chain and without any intervention by the rider. The automatic gear change takes place instantaneously whenever there is a change in speed and is silent, jerk- and jolt-free. No delay in pedalling is necessary when the gear change takes place. The speed limits at which each gear change takes place are set by means of a screw to suit the rider. The construction prevents unnecessary changes when the rider stops pedalling and when the bicycle rolls freely. In terms of its external appearance, the bicycle is no different from an all-terrain bicycle. The gear change mechanisms are housed in the sleeve in the rear wheel and in the hub, and are connected by a roller bearing chain.</p> |
