For 1981 Redline expanded the range of parts and accessories and launched the new line up of MXIII complete bikes and frames including the MXIII 500 Moto-S, MXIII 520 Tuff Rider, MXIII 600, MXIII 700 Expert and the top of the range MXIII 800. All came with the MXII or MXIII frame with a range of different parts. Pro Line Frame and Fork, Micro Line Frame and MXII Frame also available. Parts and accessories available included Chromoly Fork, Micro-line fork, Super Pro-Line Stem (aka Brute Stem), Flight Crank and Flight Crank Sprockets.