The Radius body features an offset double cutaway shape with an aerofoil profile which is thicker at the bottom and thinner at the top. It has a flat areas in the center of the top and back flowing into gently rounded edges on the perimeter. The other innovation that was introduced with the Radius is the tilt neck joint, which would be used on the early RG models.
The 540R was the first Saber model, introduced in 1987. The 540S was offered as part of the Roadstar Pro series which supplanted the Pro Line series. The initial Roadstar Pro lineup consisted of five new original body shapes: the Radius, the Saber (or S), the Power, the Turbot and the Ballback. The Roadstar Pro designation was phased out between 1990 and 1992 in favor of separate designations for the S series, Power series and Radius; the Turbot and Ballback were abandoned after just one year. (more...)
Radius models by year
Expand to see all Radius series models by year of availability:
List of all 14 models in the Radius series