Home | Features | Download PDF Brochure | Contact Info & Purchase Details     Frame Design The frame uses Speedway Motors™ “Boxed Truss” design (Patent Pending). This is the most rigid frame on the market, featuring 11 gauge frame rails that are manufactured from CR 210, zinc coated steel. The frame is finished to show quality. Rectangular steel tubing is used for the X-member for even more rigidity. Boxing of the frame uses the more traditional “stepped” method.