Call us obsessive, but in cross country racing, we know that every gram counts. That's why the Roval Control SL 29 wheels place a strict focus on competitive XC racing, meaning that they deliver in the weight, stiffness, and durability departments. To do so, they're hand-built on ultralight and incredibly stiff carbon rims that are manufactured with a Zero Bead Hook design. This design pairs perfectly with tubeless tires, while also increasing both strength and impact-resistance. Meanwhile, the rims have been laced via DT Swiss Revolution spokes to strong alloy hubs with DT Swiss 240 internals (rear only) that serve-up lightening-fast engagement and acceleration. Please note that these wheels were developed exclusively for use with 142+ compatible Specialized frames, and accordingly, they're stiffer than their non-142+ counterparts in order to provide maximum XC performance.