Twinring™ Rear Sprocket - 50 Tooth - Black 251970014 installation couldn't be easier

installation couldn't be easier

the injection-molded lens ensures zero visual distortion

Allows for up to 37x12

BL3Z-13405-B

Cycles 3 blinks and pause (When unit is ON) = critically low until battery depleted

Twinring™ Rear Sprocket - 50 Tooth - Black 251970014 installation couldn't be easierInner 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