In accordance with a preferred embodiment, a front fork wheel suspension of a bicycle has two telescoping suspension assemblies, one on each leg of the front fork. Each of the suspension assemblies includes a pair of telescoping tubes having a hydraulic fluid and an airspace therein, as well as a spring-loaded...http://www.google.com.hk/patents/US5186481?utm_source=gb-gplus-share專利 US5186481 - Bicycle with improved front fork wheel suspension
