We've spent a few seasons training and racing on wheels that ride more like they belong in the stone age than in the peloton. We put the miles in regardless, but have definitely split the difference between enjoying and enduring the ride on them. Mavic has made it easier for you to enjoy the ride and get the results you want on race day with the Ksyrium SLR Clincher Wheelset. These have everything we look for in all-around wheels; responsiveness, light weight, and durable construction. Made with Mavic's Maxtal aluminum, the Ksryium rims are joined with an SUP arc weld on the seam, giving the rims a higher strength to weight ratio than conventional alloy rims and zero brake chatter where the seam is welded. To increase the stiffness of the rim, Fore drilling is used on the lower bridge of the rim, leaving the upper bridge intact and allowing the spoke nipples to be threaded in from the bottom only, increasing the stiffness of the rim by 20 percent. Mavic gave the Ksyrium SLR the Exalith 2 treatment for a higher level of durability and performance on the brake surface. In wet conditions, the Exalith 2 treatment improves braking performance by 18 percent, so you can descend with confidence down rainy mountain passes.The Ksyrium SLR wheelset rolls on Mavic alloy hubs. These light weight hubs come with double sealed, micro-adjustable, C3 cartridge bearings. Mavic increases stability in the rear hub by placing the FTS-L reinforcement between the pawl and hub body. Two stainless steel inserts add rigidity to the fully aluminum hub body, making the hub both lightweight and strong.To keep the wheels light and responsive, Mavic employed their Traction Compression, orTracomp, spokes. Under normal loads, deflection in the wheel is limited by the traction-resistant nature of carbon fiber.