RENTHAL Twinring™ Rear Sprocket - 50 Tooth Blue YZ 125/250 1980-1998 1500-520-50GPBU Nucleon Flex Pro Knee Guards Flexible and unbreakable design that

Flexible and unbreakable design that folds backwards on impact

High-temperature Viton® and PTFE materials

- 2014-2019 Kawasaki KLX 150L Back: 2014-2019

Shiny plastic outer cover with hook-and-loop fastener

RENTHAL Twinring™ Rear Sprocket - 50 Tooth Blue YZ 125/250 1980-1998 1500-520-50GPBU Nucleon Flex Pro Knee Guards Flexible and unbreakable design thatInner ring is the same high strength Ultralight 7075 T 6 aluminum used for the standard Renthal sprocket Outer ring is electro less nickel coated steel for ultimate durability and is designed with the minimum amount of material to keep weight down The outer ring is expanded at 200C and then fitted over the inner; this interference fit combined with the wave pattern ensures a permanent bond for the life of the chainwheel The flat socket head screws add