The first-ever Freestyle BMX specific Carbon Fiber Rim. The Carbonic Rim was x3 years of R&D into utilizing the huge strength and stiffness properties of Carbon Fiber in a BMX rim. With a much wider/taller shape and a thicker layer of material around the critical areas, we are extremely happy with the end results and are stoked to bring a totally new kind of product to BMX. ###section### Product Specs WHEEL SIZE: 20" SEAM: ERD: HEIGHT: 37mm WIDTH: 26mm SPOKE HOLES: 36 WEIGHT: 360g (12.9oz : 0.80lbs) Colour: Black; Size: With Braking Surface, Brakeless