About Sram 12 Speed For Nx Eagle Rear Dearilleur Pulley Kit
Pulley kit compatible to SRAM NX Eagle™ rear derailleurs.
What is pulley Kit ?
The pulley is one of the six simple machines. Basically, all that a pulley is is a wheel spinning around an axle to aid the motion of a belt. The sprockets on a bike, for example, are a type of pulley, because when they spin, they drive other sprockets on the bike, that in turn rotate the rear wheel.
About Sram Brand
SRAM was founded on a single product in 1987 and introduced the Grip Shift (or twist shift) shifter to the road bike market in 1988. In 1991 that technology was adapted for mountain bikes, and SRAM quickly grew. SRAM's story begins In early 1987 with founder Stan Day training for and racing in triathlons.