These piston rings are produced for Triumph 650 c.c. motorcycles by Grant and are a superior choice for your vintage British motorcycle. Made in the USA.

NOTE: Triumph 650 c.c. bikes have a 71 mm bore standard, 0.020" is 71.5 mm, 0.040" is 72 mm, 0.060" is 72.5 mm, and 0.080" is 73 mm.