If high intensity cross country is your game this is your wheel. Engineered for aggressive cross country performance this lightweight 29' wheel features a full-carbon hookless rim to boost quickness efficiency and control on modern technical XC terrain. Hammer up technical climbs with less effort Lightweight full carbon UD2 rims. Precise handling and compliance on aggressive XC terrain Enhanced carbon fibre rim laced with 24 straight pull spokes. Laterally stiff and vertically compliant feel on the trail. Efficient power transfer Lighter stiffer Infinity hubs with ultra-reliable ID360 dual ratchet freewheel system for instant acceleration. Weight Pair: 1570g Rear: 850g Front: 720g Understanding the different Mavic freehub body acronyms: HG or M11 – Shimano HG Road 11/12x other speeds with spacer MS - Shimano Microspline XD - SRAM XD XD-R - SRAM XD-R ED11 - Campagnolo 9/12x N3W - Campagnolo 13x