Rear chain 110056, 530, (5/8 inch x 3/8 inch, 0.625 in x 0.380 in) 98 pitch Renolds A&S with joinerSuit Commando 1968 - 72 [19T gearbox sprocket], AJS, Matchless 18S 1949-58 Rear; CS 1950-55; 16MS 1949-58; 16MCS 1950-55; Norton ES2 1963;AR10B1