Mountain Bike Components

Mountain Bike Parts, Components and Accessories

Plastic Disk Behind a Cassette: What it’s for & How to Remove

Plastic Disk Behind a Cassette: What it’s for & How to Remove

This is about the mysterious circular, see-through piece of plastic between the spokes and the cassette. Bikes of all kinds and price ranges ship out with these things. Strangely enough, bicycles you see out on the streets and trails almost never have that component mounted. Weird, right? So, what is the plastic disc on the back wheel of a bike?