Efficiency and grip for versatility new x mix quest dual compound 5550 grip in all condition and durability high spaced knobs create traction predictable braking and precise cornering large volume for comfort and confidence reliability guard reinforced casing x mix dual compound long lasting rolling tread ust tubeless ready to help reduce risk of flats designed to maximise the performance of the xa wheels developed as a single unit with the xa wheels to maximise performance and aestheti