Low uniform tread profile offers minimal rolling resistance while edge knobs that are larger and hooked to give you maximum traction in the corners. RS3 rubber compound allows for very low rolling resistance amazing grip and a lightweight low profile tread design. Sealant compatible tubeless. RS3 is Kenda`s fastest rubber compound and used exclusively for high end racing tires - significantly lower rolling resistance and increased wet weather traction. TR - Tubeless Race is the lightest tubeless ready version tire Kenda offers. Utilizing a modified bead shape for better tubeless sealing and performance while offering the lightest sidewall available