Mavic Cosmic SL 40 RB QR Wheelset

Cosmic SL 40 wheels blend aero speed, low weight, and all-around race readiness

What Our Gearhead® Experts Are Saying:

"I’ve been running the Cosmic SL 40s for fast training rides and crits—they strike a great balance between lightweight climbing performance and aero gains on the flats. They feel planted in corners and accelerate with punch, especially when paired with a quality tubeless tire setup."

When we want one road wheelset that does it all—climb, corner, sprint, and descend—we trust the Mavic Cosmic SL 40. It brings the aerodynamic advantage we want for fast group rides and race day, while staying light enough to fly uphill and stay lively all ride long. Whether we’re hammering breakaways or cruising solo, these wheels keep us rolling fast with confidence-inspiring control.

The 40mm deep carbon rim delivers meaningful aero savings without feeling twitchy in crosswinds, making it ideal for everyday use. A hookless, 21mm internal width rim bed is optimized for 25–32mm tubeless road tires, giving us smoother rolling and better cornering grip. Paired with Mavic’s Infinity hubs and QRM Auto bearings, the Cosmic SL 40 offers efficient power transfer and long-term reliability in a lightweight, race-ready package.

Details

• Versatile carbon road wheelset for racing and high-speed training
• 40mm aero rim depth balances speed with stable handling
• Hooked bead rim supports tubeless and clincher tire setups
• 19mm internal width optimized for 25–32mm road tires
• Infinity hub platform offers fast engagement and efficient power transfer
• QRM Auto sealed cartridge bearings deliver long-lasting smoothness
• Light enough for climbs, aero enough for sprints and flats
• Ideal for fast group rides, gran fondos, and crit racing
• Item #MAVZ28J

Tech Specs

Rim Material

carbon

Wheel Size

700c

Rim Type

tubeless-ready, hook bead

Rim Depth

40mm

Rim Width

[internal] 19mm

Brake Compatibility

rim brake

Hubs

Infinity design, aluminum

Front Axle

9 x 100mm QR

Rear Axle

10 x 130mm QR

Spokes

steel, straight, flat, constricted (front and rear opposite freewheel side)

Spoke Nipple

steel, ABS, black

Spoke Count

[front] 18, [rear] 24

Claimed Weight

[pair] 1600g, [front] 705g, [rear] 895g

Manufacturer Warranty

2 Years (Lifetime with Registration of Free Mavic Care Program)

Includes

user guide, level 2 quick release, carbon brake pads, rim tape (mounted), UST valve (not mounted), multifonction adjustment wrench with the rear wheel

Activity

bike