COSMIC SLR 32 DISC 21mm

Designed for fast climbing and maintaining controlon descents, the Mavic Cosmic SLR 32 is a pair of tubeless carbon road wheels, ideal for endurance road bikes on mountainous routes.

Its 32 mm UST UD carbon fibre rim features a 21 mm internal width to accommodate tyres from 25 mm upwards.

The Adaptive Layup construction lightens the rim by reinforcing only the stressed areas, whilst the Fore Carbon spoke-to-rim connection keeps the upper rim intact for long-lasting sealability without a rim tape.

The 24 aero spokes, laced in pairs, work with the Infinity hub and Instant Drive 360 freehub for direct power transfer.

Mavic Ceramic bearings and HG-R or XDR freehub bodies complete a package designed to ride hard, for long distances, and conquer the peaks.

Main features

Smoother acceleration on climbs thanks to 1390 g

Claimed weight 1390 g per pair (630 g front, 760 g rear) and 32 mm profile: inertia is kept in check, making it easier to change pace on climbs. Its 24 spokes provide noticeable stiffness when riding out of the saddle.

Smoother rolling over long distances with Mavic Ceramic bearings

Mavic Ceramic bearings: ceramic balls, low-density grease and highly lubricated seals, to reduce friction and maintain performance over the miles. On long climbs and fast sections, the wheel maintains its speed better.

Reliable, leak-free tubeless fitting: Fore Carbon technology

Fore Carbon technology ensures an intact upper rim for long-lasting watertightness, without relying on a rim base weakened by repeated disassembly. Easier tyre fitting, cornering control at the right pressure, and fewer punctures caused by pinching.

Key technology

LightnessAdaptive Layup Carbon technology
Optimized carbon layup for tailored combo of lightness, stiffness and compliance
Efficiency RigidityFore technology
Stiffer and stronger. Instead of being drilled, the lower rim bridge is pushed up on the inside, then threaded to enable the spoke nipples to be directly screwed in it, leaving the upper rim bridge intact.
Efficiency RigidityInstant Drive 360 freewheel technology
The new Instant Drive 360 freewheel system is super light and efficient. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile.
Efficiency RigidityUST tubeless technology
Traction and control. Universal Standard for Tubeless. Ready to ride tubeless system. The UST concept improves traction, control and comfort whilst reducing inertia and flats.
Safety ReliabilityInfinity hub design
Efficient power transfer thanks to optimised non-contact spoke lacing (no noise under load) and tension distribution. The length of the spokes at the front and rear is identical. Maintenance is easy thanks to a tool-free solution.

Specifications

  • Weight Pair : 1390 g
  • Weight Front : 630 g
  • Weight Rear : 760 g
  • Material: 100% Unidirectional carbon fiber
  • Height: 32 mm
  • Internal width: 21 mm
  • Drilling: Fore Carbon tapeless tubeless technology (front/rear 24 holes)
  • Braking: disc
  • ETRTO size: 622x21TC hooked
  • Tire: UST Tubeless Ready
  • Shape: straight, aero, constricted, antirot (front and rear)
  • Screw: M6
  • Lacing: crossed 2 (front and rear) 
  • Body material: aluminium
  • Disc standard: Center Lock® only
  • Axle material: aluminum
  • Axle size: front 12x100 / rear 12x142
  • Freewheel: Shimano HG road / Sram XD road
  • Bearings : Mavic Ceramic
  • Freewheel body: convertible SRAM XD road (kit V2580101 sold separately)
  • Freewheel body: convertible SHIMANO HG light road (kit V3850101 sold separately)
  • Freewheel body: convertible CAMPAGNOLO N3W (kit V4270101 sold separately)
  • User guide
  • Rim tape mounted on wheel
  • UST valve not mounted on wheel
  • Minimum tyre size: width 25mm - pressure max. 6.1Bar/88PSI
  • Maximum tyre size: width 64mm - pressure max. 3.5Bar/51PSI
  • ASTM category 2 : road and offroad with jumps less than 15cm
  • Maximum weight supported by the wheels: must not exceed 120 kg (bike weight included)

Cyclists' opinions

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ericAmateur (1–2 rides per week)
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10/18/25
“super roues ..rapide efficace en montee que du bonheur un peu moins raide sur le plat que les look rd 38 que j avais ..mais je regrette pas .. c est du bon ”

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tommasoAmateur (1–2 rides per week)
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9/22/25
“Ottima resa pianura e salita, facile da controllare in qualunque situazione provata con copertura e camere leggere Tpu. Thomas”