Mavic Cosmic SL 65 Disc Wheelset

The Mavic Cosmic SL 65 Disc Wheelset is Mavic's deep-section aero disc road wheel — 65mm of 100% unidirectional carbon, disc brake only, tubeless ready from the factory. At $1,789, the Cosmic SL 65 brings together a NACA-profiled rim with the full Mavic hub platform: Infinity hubs, Instant Drive 360 freehub engagement, and QRM Auto sealed bearing preload. Mavic has been building road wheels in Europe since 1889, and the Cosmic line represents the top of their road disc offering for riders who want real aero depth with the brand infrastructure — parts, conversions, serviceability — to back it up.

The rim is 100% unidirectional carbon at 65mm deep, shaped using a NACA-derived cross-section profile. NACA profiling — borrowed from aircraft wing design — optimizes the rim's aerodynamic efficiency across a range of wind angles, not just head-on. The result is a wheel that generates less drag in crosswind conditions than a blunt-edged rim at the same depth. At 23mm internal width, the Cosmic SL 65 accommodates modern 25–32mm tires with a clean tire-to-rim transition and supports both tubeless and standard clincher setups. The rim's reduced rotational inertia makes the wheel quick to accelerate — meaningful in criteriums, sprints, and the repeated accelerations of a road race.

Infinity Hubs and Instant Drive 360

The Infinity hub design uses a non-contact spoke lacing geometry that eliminates spoke-to-spoke friction and movement under load. Spokes run at an angle that keeps them from touching at crossings, which removes the minor flex and noise that builds up on conventional lacing patterns over time. Spoke length is identical front and rear, and the system is designed for tool-free spoke access — a practical advantage for riders who service their own wheels or race frequently enough that a roadside spoke replacement is a realistic scenario. Instant Drive 360 is Mavic's freehub engagement mechanism: a contactless rubber seal keeps friction low while a broad range of end caps makes the hub compatible with multiple axle standards. The wheelset ships with a Shimano HG freehub body and includes quick-release axle adapters for 9x100mm front and 9x135mm rear — conversion kits for SRAM XD, Campagnolo ED and N3W, and Shimano MicroSpline are available separately.

QRM Auto Bearings and UST Tubeless

QRM Auto — Qualité de Roulements Mavic — is Mavic's sealed cartridge bearing system with automatic preload adjustment. The bearings are double-sealed with C3 internal clearance and self-adjust over time to maintain consistent spin without requiring manual intervention. In practice, this means the hubs feel the same at two years of use as they do when new, without regular bearing service. Mavic co-developed the UST (Universal Standard for Tubeless) standard, and the Cosmic SL 65 is built to it. Rim tape is pre-installed; the UST-spec bead seat and rim bed produce a consistent, reliable tubeless setup that doesn't require the compatibility research a third-party conversion does. Tire range runs from 25mm to 62mm width; Mavic recommends a minimum of 28mm for this rim. Maximum tire pressure is 80 psi.

The wheelset runs 12x100mm front and 12x142mm rear thru-axles, with the included adapters covering QR conversion for both wheels. Maximum system weight — rider and bike combined — is 120kg. The Cosmic SL 65 Disc is designed and manufactured in Europe and is eligible for Mavic's lifetime warranty. For a disc brake road rider building a deep-section aero setup that holds up over seasons of use, the Cosmic SL 65 is a complete, well-engineered answer at its price.