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Mavic Cosmic SLR 45 2021

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Cosmic SLR 45

The drive to reduce weight may be a universal obsession for every cyclist, but not every gram is created equal. A rotating mass requires additional kinetic energy to accelerate, meaning that rim weight directly correlates with snappy accelerations and out-of-the-saddle kicks. While tubeless wheels roll faster, they come with added weight and the hassle of a rim tape. In the quest for a lightweight solution with no compromise on rigidity, our engineers went back to the drawing board and came up with our new Cosmic SLR45 wheelset.

Our Fore Carbon Technology lies at the heart of the Cosmic SLR45 design. It’s the result of years of research and combines low weight and improved tubeless assembly with increased rigidity and ease of repair. 10% lighter and stronger than traditional wheel designs, our Fore Carbon Technology incorporates spokes that fit directly into a co-molded metallic insert that avoids the need to drill the upper rim bridge. This negates the need for rim tape, makes for easy repairs, and saves an additional 30g per rim.

Accelerate and climb faster, hold higher speeds

New rim laminate and Fore Carbon spoke attachment saves 40g and eliminates rim tape (another 30g saved per wheel)
45mm deep/26mm wide NACA rim profile optimized for disc brakes
Patented lightweight aero spokes

Stiffer wheel for improved power transfer

Fore Carbon technology keeps the rim upper bridge solid and makes the rim stiffer
New Infinity hub plaform: stiff axle, durable bearings and new hub design optimizes lacing and spokes tension
ID360 freewheel technology for instant power transfer

Improved UST Road delivers more speed, comfort and control in an easy to use tubeless system

No tubes means less friction, better efficiency and grip, and a reduced risk of punctures
New rim bed shape makes it easier to mount and change tires
Fore Carbon drilling technology doesn't require the use of rim tape
  • Front axle: 12x100 thru axle, easily convertible to quick release with included adapters. Not compatible with 15mm through axles.
  • Rear axle: 12mm thru axle, convertible to Quick Release with optional adapters
  • Freewheel: Shimano/Sram, convertible to Campagnolo and XD-R with optional driver bodies


  • Infinity Hubs
  • Front: Quick release and 12x100 through axle compatible
  • QRM Auto bearing preload technology
  • Rear: Quick Release, 12x142 and 12x135 compatible
  • Instant Drive 360 freewheel technology
  • Front and rear bodies: aluminum
  • Axle material: aluminum


  • Lacing: front and rear crossed 2, contactless
  • Shape: straight pull, elliptical aero, double butted (patented)
  • Material: steel
  • Nipples: Fore integrated aluminum
  • Count: 24 front and rear


  • Fore Carbon tapeless tubeless technology
  • Material: 100% carbon fiber
  • ETRTO size: 622x19TC Road
  • UST tubeless technology
  • Internal width: 19 mm
  • Disc brake specific profile
  • Height: 45 mm
  • Tire: UST Tubeless and tubetype


  • Max. Pressure: see indication on wheel and tyre. If they differ, use the lowest of the 2
  • For a longer longevity of the wheel, Mavic recommends that the total weight supported by the wheels doesnn't exceed 120kg, bike included
  • ASTM CATEGORY 2 : road and offroad with jumps less than 15cm
  • Recommended tyre sizes: 25 to 32 mm




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