Complex sentence: Conventional-gear Champs feature a steerable tailwheel and most have steel tube main gear which use an oleo strut for shock absorption; one variant utilized sprung-steel main gear, and American Champion is using aluminum gear legs in its production model of the Champ.
Split into simpler sentences: Conventional-gear Champs feature a steerable tailwheel and most have steel tube main gear which use an oleo strut for shock absorption. One variant utilized sprung-steel main gear, and American Champion is using aluminum gear legs in its production model of the Champ.