 The GTS used the RADD, Inc. front suspension designed by James Parker.A single sided girder fork was use on the German Imme R100 motorcycle between 1949 and 1951, and the Vespa scooter has a single-sided trailing-link fork.More recently, between 1998 and 2003, the ItalJet "Dragster" scooter also used a single-sided swingarm suspension, though unlike the GTS1000 there was no upper control arm; the upper part of the suspension on the Dragster served only to transmit steering input.