Triumph piston rings 500 T100 Size Standard STD Grant USA Made Ring set unit twin PWK this is the correct device

this is the correct device

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Triumph piston rings 500 T100 Size Standard STD Grant USA Made Ring set unit twin PWK this is the correct deviceYou are bidding on a brand new size STD Piston ring set for all Triumph 500 unit twins 1959 to 1973 Grant USA Made. Includes everything you see in the picture. These are brand new, never installed, and are quality parts that are proven. Piston ring gap: The new industry standard for British motorcycles is to gap the rings at . 020 New independent lab tests and studies (in the USA and England) show that any gap between . 024 to . 010 is efficient, and