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While it may seem easy to get bogged down in the myriad acronyms peppering the Mavic Crossmax Elite WTS 27. 5in Wheel's spec sheet, the only thing that really matters is that the mishmash of letters and numbers results in a lightweight wheelset that's fast enough to rip any cross country course and strong enough to withstand the bumps along the way. The star of the show is undoubtedly Mavic's Inter Spoke Milling 4 Dimensions ISM 4D process, which is a mainstay in reducing rotational weight and enabling the Crossmax Elite to accelerate in a snap and hold speed across varying terrain.ISM 4D represents the latest iteration of one of Mavic's signature design pieces: milling the unnecessary material from a rim to eliminate grams and reduce rotational mass along the wheel's circumference. The original ISM was limited to the rim's inner face. It's successor, ISM 3D, expanded that treatment to the sidewalls. ISM 4D goes a step further, smoothing the rim's transitional angles as much as possible while maintain the rim's structural integrity. The net result is a 15% reduction in claimed weight without a corresponding penalty to stiffness or durability, and it also increases the rim's aerodynamics by minimalizing potential footholds for the wind. By reducing resistance from inertia and air, ISM 4D wages a two pronged campaign against the most pernicious foes of forward motion.While Mavic's ISM 4D is responsible for keeping rim weight low, the Instant Transfer System 4 ITS 4 rear hub ensures that all that efficiency isn't wasted by sluggish, unresponsive engagement. IST 4 is a four pawl system that alternates engagement between two pairs of pawls. Since both pairs engage at different points in the freehub's rotation, the gap between engagement points falls to just 7. 5 degrees of free play. This nearly immediate engagement is notable for sprinting out of corners and jockeying for position in mass starts, and it really shines on technical climbs that require you to pic...
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