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  • Product description

    The Ksyrium Pro SL is the result of over 15 years’ wheel development. 


    Shimano/SRAM | 23c tyres

    Shimano/SRAM | 25c tyres

    Campagnolo | 23c tyres

    Campagnolo | 25c tyres

    All versions are clincher, 11 speed compatible

    Breaking the mould

    When it was first introduced in 1999, Ksyrium totally broke the mould of wheel build (traditionally 32 thin steel spokes with tiny nipples, traditional drilling and lacing). It drastically improved the ride quality of a wheel and a new generation of wheel system was born that would set the industry benchmark in the 21st century.

    The secret? Finding the sweet spot for wheel performance as it became lighter, stiffer, more comfortable and at the same time more reliable than ever. The key technological developments that enabled this became character traits that still define Ksyrium today: 

    Revolutionary Fore drilling

    Probably the greatest Ksyrium innovation is the revolutionary spoke-rim interface, taken directly from the aeronautics industry, called Fore drilling. Here the rim isn’t actually drilled. Instead its lower bridge is heated, then pushed on the inside forming a channel on which a thread is formed. The nipples (integrated into the spoke) are then directly threaded on the rim. The thread is much larger and deeper than on a traditional steel spoke and nipple, creating the strongest possible connection between the rim and the spoke. 

    And because the upper bridge of the rim remains intact (no drilling) the stiffness of the rim increases by about 20% without creating the weak point generated by traditional drilling. On top of that, no rim tape is needed, saving another 40g on the wheelset at the most important point of the bike

    Zicral alloy spokes

    Ksyrium Pro SL also uses super aero and light Zicral alloy spokes that are stiffer, stronger and lighter than the stainless steel versions used on all bicycle wheels since the end of the 19th century. 

    New for 2016: ISM4D

    Year after year we have refined our Ksyrium technology and expanded its features (ISM3D, asymmetrical rims, double butted spokes, front carbon hubs…). So Ksyrium is constantly getting lighter, stiffer and stronger. 

    And this year we’ve done it again. For 2016 the Ksyrium SL becomes the Ksyrium Pro SL with a brand new rim, based on our new rim weight saving technology: ISM4D (Inter Spoke Milling 4 Dimensions).

    With ISM4D, each part of the rim is precisely machined leaving just the material needed to guarantee the stiffness and strength of the wheel. The result is a superlight rim at just 370g that also saves you 4 watts thanks to its smoother aerodynamic shape. The total wheel weight remains at an impressively low 1395g.

    Matching Yksion Pro tyres

    The rim is matched with our Yksion Pro tyres that offer a supple 127 TPI casing, Kevlar beads, a well-balanced rubber compound that offers the best blend of grip and rolling resistance and a weight of only 190g in 23mm and 205g in 25mm.

    Ksyrium Pro SL is available with 23mm or 25mm tyres.

    Key Features:

    ISM 4D wheels keeps weight low while improving aerodynamics

    GripLink and PowerLink tyres increase rolling efficiency and grip

    Zicral spokes and Fore drilling improves lateral stiffness

    ISM 4D rim machining makes for the lightest road rims

    Zicral spokes lowers weight while maintaining stiffness

    Superlight Yksion Pro tyres

    Fore drilling makes for a secured spoke / rim interface

    Strong oversize Zicral alloy spokes

    Sealed cartridge bearings


    Tyre 700x25: 210 grams

    Tyre 700x23: 190 grams

    Pair without tyre: 1395 grams

    Front without tyre: 600 grams

    Rear without tyre: 795 grams


    Material: Maxtal

    Height: front 24mm, rear 26 asymmetrical

    Joint: SUP

    Drilling: Fore

    Brake track: UB Control

    Weight reduction: ISM 4D

    Valve hole diameter: 6.5 mm

    Tyre: clincher

    ETRTO size: 622x15C

    Recommended tyre sizes: 23 to 32 mm


    Material: Zicral

    Shape: straight pull, bladed, front double butted

    Nipples: Fore integrated aluminum

    Count: front 18, rear 20

    Lacing: front radial, rear Isopulse


    Front body: carbon with aluminum flanges

    Rear body: aluminum

    Axle material: aluminum

    Adjustable sealed cartridge bearings

    Freewheel: FTS-L steel


    Yksion Pro GripLink (front) & PowerLink (rear)

    Front and Rear Tread: Single Compound

    Casing: 127 TPI

    Breaker: Front Kevlar, Rear nylon

    Dimensions: 23-622 (700x23c) or 25-622 (700x25C)

    Max. Pressure: 23mm 8.7 bars - 125 psi

    Max. Pressure: 25mm 7.7 bars - 110 PSI

    In the Box:

    Quick release skewer/s
    • (Front wheel = 1 X QR skewer)
    • (Rear wheel = 1 x QR skewer)
    • (Pair = 2 x QR skewers)
    Multifunction adjustment wrench
    User guide

    Recommended weight limit : 120kg

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