Possibly the best solution to come about for gliders in love with the security and warmth of a wodent wheel's cover but the needed peace of mind for owners worried about crossbar and cleaning issues associated with the out of date Wodent Wheel. The rapid runner uses the wodent wheel shell, has no crossbar, includes a smooth running bearing, and a mesh track. For wodent wheel lovers, this is the best of both worlds. The Rapid Runner can be found at: sugargliderwheels.webs.com