Bike handlebar risers are 100% fits for R15 V4 & M . High-Strength Metal cylindrical billet Which Are Attached Under Bike Handlebars Mount. Made of Good Metal , So Twisting And Bending Are Therefore Practically Impossible. They Are Tower-Like Pieces That Serve To Elevate The Level Of The Handlebars In Order To Make The Ride More Comfortable For A Rider Given His Or Her Height Relative To The Front Of The Bike.