Mavic

Cosmic SL 65 23i Wheelset

What Our Gearhead® Experts Are Saying:

"The Cosmic SL 65 Disc is the wheelset I reach for when the course is flat and the goal is speed. The 23mm internal width running tubeless at lower pressures gives a noticeably more planted feel in crosswinds compared to narrower deep section options, and the Infinity hub's non-contact lacing stays completely silent even under sustained high-torque efforts. For riders chasing aero performance without giving up real-world handling, this is a genuinely well-resolved package."

Deep section carbon wheels earn their place on flat roads and rolling courses where aerodynamic efficiency compounds over distance, and the Mavic Cosmic SL 65 Disc was designed with exactly that application in mind. The 65mm unidirectional carbon rim delivers meaningful drag reduction on open terrain while the 23mm internal width supports a wider tire contact patch that keeps handling confidence high when conditions get gusty. Mavic's Aero Wide Rim technology optimizes the rim-to-tire transition geometry to reduce micro-turbulence at the leading edge, a detail that pays dividends across long flat efforts where even small aero losses stack up.

The Infinity hub architecture underpins the wheelset's performance credentials with a non-contact spoke lacing design that eliminates noise under load while distributing tension more evenly across the hub flanges. Matched spoke lengths front and rear reduce the number of unique spare parts needed for field maintenance, and the freewheel body is tool-free serviceable for straightforward trailside or workshop access. QRM Auto bearing preload technology uses a self-adjusting cartridge system with C3 internal clearance and double sealing, maintaining optimal spin and axle play tolerance automatically over the life of the wheel. Adaptive Layup carbon construction places fiber only where structural demands require it, saving up to 70g per rim compared to a uniform layup approach without compromising stiffness or reliability under load.