These were introduced on the 1971 models. There are 2 sizes of fronts and rears. The small ones were for the unit singles BSA and Triumph TR25. The big rears are very much sought after by caferacers that want to make a Manx lookalike.
BREXIT. After 1-1-2021 no more shipping to the UK. Customs and new VAT rules make this impossible. You were nice customers, Sorry.