1992 Chevrolet W4500 Tiltmaster 13000lb|14250lb GVW|320mm x 100mm; Position: Rear;. 1992 Chevrolet W4500 Tiltmaster 13000lb|14250lb GVW|320mm x 100mm|Front Disc Brakes; Position: Rear;. 1992 Chevrolet W4500 Tiltmaster 320mm x 100mm - 13000lb and 14250lb GVW|Front Drum Brakes; Position: Rear;.