The Ksyrium S Disc is 40g lighter than the former Ksyrium UST Disc while also being stronger and laterally stiffer. Stiffness is optimized using Fore technology. The upper bridge remains undrilled, optimizing strength and rigidity, and it doesn\\\'t require the use of a rim tape, which saves another 30g per wheel. The rim bed\\\'s new shape makes it easier than ever to mount and remove tires, and our UST Tubeless technology improves rolling resistance and grip while reducing the risk of punctures. Those rims are made in France, in our aluminum rim factory. The Ksyrium S Disc doesn\\\'t just ride fast, it looks fast too. Matte painted hubs, invisible rim welding and deep black spokes give this wheelset a premium look that stands out from the crowd. Engineered specifically for disc brakes, it\\\'s compatible with a 12x100 axle up front, and can convert to Quick Release with supplied adapters. Key FeaturesRim weighs only 430g No rim tape is needed, saving 60g over a traditional wheelset Fore technology keeps the rim upper bridge solid to make the 19mm wide rim stiffer New Infinity hub plaform: stiff axle, durable bearings and new hub design No tubes means less friction, better efficiency and grip, a reduced risk of punctures New rim bed shape makes it easier to mount and change tires Fore drilling technology doesn\\\"t require the use of rim tape SpecificationETRTO size: 622x19TC Road Rear axle: Quick Release only QRM Auto bearing preload technology Axle material: aluminum Lacing: front and rear crossed 2, contactless Weight without tyre: 820 grams