CCU Ultimate is not just a name, it’s the word we reserve for pinnacle performance. And it’s now finally compatible with tubeless and clincher tyres and for disc brake bikes.At just 1255g, this wheelset is the ultimate balance of lightweight, stiffness and aerodynamics. The rim is engineered with a NACA-inspired, full-carbon profile that’s 45mm deep and 27mm wide. It’s made from a complex lay up that optimizes the stiffness to weight ratio. Its external layer takes our distinctive UD² finish.The rim is not drilled, so it doesn't require the use of a rim tape to become airtight: a guarantee for a hassle free tubeless use.The 20 elliptical carbon fiber spokes and high, thin carbon hub flanges offer a proven aero advantage.The spokes are made with unidirectional carbon fibers, so they don’t stretch. The spokes run continuously from one edge of the rim to the other, through the hubs (R2R technology), creating one single spoke instead of two. This adds wheel stiffness and eliminates the need to mechanically attach the spokes to the hub.Inside the carbon hub shells, the axles are paired with automatically adjusted sealed cartridge bearings for perfect preload. At the back, the ID360 freewheel system provides instant engagement (40 points of engagement = 9°) and low friction. The hubs are thru-axle compatible (12x100 up front and 12x142 at the back) and made for Center Lock brake rotors. Ultralight and aero help you climb, sprint and accelerate faster Monobloc full carbon construction45mm NACA rim profile seamlessly laced with elliptical spokes on high thin hub flanges Stiffest wheel system in its class with super low rolling resistance for high reactivity Carbon spokes with high tensile resistanceRim to rim (R2R) lacing systemTapeless tubeless UST rim Handmade in France Manual molding and assembling processDeveloped and manufactured in the Mavic carbon workshop in Annecy, FranceDelivered with exclusive wheelbag SPECIFICATIONS Weight Weight Pair : 1255 g Weight Front : 575 g Weight Rear : 680 g Rims Material: 100% carbon fiber with UD external layer Height: 45 mm Internal width: 19 mm Drilling: co-molded Fore drilled inserts (front/rear 20 holes) Braking: disc ETRTO size: 622x19TC Tire: UST Tubeless Ready Spokes Material: unidirectional carbon fiber Shape: straight, extra-flat (front and rear) Lacing: crossed 2 (front and rear) Hubs Body material: carbon and aluminium Disc standard: Center Lock® only Axle material: aluminum Axle size: front 12x100 / rear 12x142 - Convertible to quick release with included adapters Freewheel technology: Instant Drive 360 Freewheel: Shimano HG road Bearing technology: QRM automatic setting - sealed cartridge Intended use Minimum tyre size: width 23mm - pressure max. 6.75Bar/97PSI Maximum tyre size: width 62mm - pressure max. 3.8Bar/55PSI ASTM category 1 : road only Maximum weight supported by the wheels: must not exceed 120 kg (bike weight included)