AVAILABILITY : 0Black Scrub Rotor 180mm: Scrub rotors are built from a metal-matrix composite, a cutting edge and uniquefamily of materials. Here is a quick rundown of the benefits:The most obvious advantage is the weight. Anaverage 160mm stainless rotor weighs in at around 120 grams, or about 4.3ounces. A Scrub rotor of the same size weighs 56.0 grams, or just a hair over 2ounces!The material transfers heat about 7 times moreefficiently than steel. Scrub rotors will cool down faster, and make your brakeswork better.This composite is quite strong for how lightit is, and is stiffer than traditional aluminum alloy. Assuming that the correct sizerotor is used for your application, we do not have a weight restriction on ourproduct.We don't use coatings of any kind to provide abraking surface. That means there is nothing to wear off. You will never need toleave your Scrub rotors home when the trails are wet or muddy.