A ride cymbal is a type of cymbal that is used to keep time in a musical piece. It is typically played with a drumstick and is one of the most important cymbals in a drum kit. Ride cymbals come in a variety of sizes, from 16 inches to 24 inches, and are made of various materials, including brass, bronze, and copper.
Rock cymbals are a type of cymbal that is specifically designed for use in rock music. They are typically heavier and louder than other types of cymbals, and are often used for crash cymbals or hi-hats. Rock cymbals are not typically used for keeping time in a musical piece.