The Fundamental rim is a made from high quality AL6061-T6 and has a pinned-joint. The really wide and low profile is designed especially for freestyle mountain bikes. Perfect for dirt / street / slopestyle / Freeride / heavy duty Enduro. By carefully designing the wall thickness distribution it was possible to make a strong and light rim with no eyelets. The rims come with wide NS rim tape that is high pressure resistant. Another cool feature is the great price!