The new crank brothers cobalt 2 wheelsets are a perfect mix of strength performance and stiffness for xcrace and trail riding this tubeless wheelset uses low rotational inertia which by bringing the mass of the wheel towards the hub and away from the rim helps you experience faster acceleration and deceleration the twinpair triangular spoke design results in a stronger wheel as well as gives your bike a differnt look which will get heads turning on the trails for easy servicing not only