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Fulcrum Speed 25 C21 2-Way Fit disc AFS wheelset

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  • Fulcrum’s new Speed 25 marry lightness and handling in a low profile wheel, which is perfect to conquer peaks and enjoy the downhills, thanks to the application of Fulcrum’s premier technologies.

    The inspiration for the development of the Speed 25 were the race-winning Racing Light XLR. An extremely successful and popular wheel both with the general public and with the professional racers who used them for mountain stages. The Speed 25 have a 26 mm profile, which is symmetrical on the front and asymmetrical on the rear, to optimise the sweet spot between lightness and aerodynamics. With an official weight of only 1,285 grams, they are the ideal wheel for cyclists looking to post their best times uphill, but also for ultra-cyclists who have to deal with adverse weather conditions and want a stable and reliable wheel even in strong gusts of wind. The Speed 25 have been developed in a disc-brake version, with an inner rim width of 21mm and Fulcrum’s proprietary technologies, MoMag and DIMF. The minimally-designed hubs use USB ceramic bearings. Lightness, handling and smoothness are the key aspects of the wheels’ performance.

    Performance highlights
    • Full carbon climbing wheelset
    • Direct inmold matt finish (DIMF)
    • 2-way fit (clincher/tubeless)
    • 21 mm inner rim width
    • USB ceramic bearings
    • Weight 1,285 g



    The most significant aspect is the difference between the symmetrical front rim and asymmetrical rear rim, that guarantees excellent aerodynamics and extreme reactivity.
    The asymmetrical rear profile has allowed us to create better dish angles and achieve great lateral stiffness, which is fundamental in uphill sprints.

    There are various factors that go into reducing the weight of a pair of wheels to only 1,285 grams, the first of which is the 26 mm profile.

    Carbon Finish
    The rim has a DIMF matt finish directly from the mould, without paint treatments, that would obviously increase the total weight.
    This has been made possible by using specific resins that also protect the rim.

    Hub Design
    The minimal design of the hub makes a considerable contribution to the low weight.
    Its weight has been reduced and its internal and external sections have been optimised so that it is as aerodynamic as possible, as well as reliable, strong and able to withstand considerable torsional stresses.

    A low profile wheel is synonymous with lightness, but also great handling and ride feel.

    Differentiated Rim Profile
    The most significant aspect is the difference between the symmetrical front rim and asymmetrical rear rim, that guarantees excellent aerodynamics and extreme reactivity.
    The asymmetrical rear profile has allowed us to create better dish angles and achieve great lateral stiffness, which is fundamental in uphill sprints.

    Spoke Profile
    The same objective was behind the design of the flat and aerodynamic spokes of the Speed 25. In line with Fulcrum’s design philosophy of the perfect alignment of the nipple with the spoke, the spokes don’t touch. There are various advantages to this approach, made possible also thanks to the precision of Fulcrum’s technologies: constant long-term durability, resistance and stiffness, without any of the creaks that can develop when spokes rub.

    Tubeless ready
    The 2-Way Fit system lets you fit tubeless tyres without rim tape, thanks to the non-drilled bridge.

    • Tyre type: 2-WAY FIT (Clincher and Tubeless)
    • Weight: 1,285 g
    • Rim height: front: 26 mm, Symmetrical; rear: 26 mm, Asymmetrical
    • Rim width: 27,6 mm
    • Inner rim width: 21 mm
    • Axle front: 12x100mm TA
    • Axle rear: 12x142mm TA
    • Brake system: Disc brake
    • Spokes: 24 front and rear; steel double butted, straight pull
    • Bearings: USB ceramic
    • Freewheel body: XDR, HG11, N3W
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    • 1x Fulcrum Speed 25 Set
    • incl. wheel bag
  • Show all items from FulcrumFulcrum is a well-known Italian manufacturer of high-performance bicycle wheels. The company was founded in 2004 by three aerospace engineers who were passionate about cycling and wanted to create a new standard in bicycle wheels. Fulcrum quickly established a reputation for producing high-quality, lightweight, and durable wheels that are designed for optimal performance.

    One of the key innovations that Fulcrum is known for is its use of asymmetric spoke lacing on its wheels. This design helps to balance the spoke tension on the drive side of the wheel, which increases stiffness and improves power transfer. Fulcrum also uses high-quality materials, such as carbon fiber and aluminum, to create lightweight and durable wheels.

    Fulcrum offers a wide range of wheels for different types of riding, including road, mountain bike, cyclocross, and gravel. The company also offers a range of wheels for specific disciplines, such as time trial and triathlon. Additionally, Fulcrum has a range of wheels specifically designed for e-bikes.

    Fulcrum's commitment to innovation, quality, and performance has made it a trusted and respected brand in the cycling industry. Many professional cyclists and teams use Fulcrum wheels, and the company sponsors several professional cycling teams.

    Overall, Fulcrum is a well-established brand that is known for its high-performance, durable and lightweight wheels for different types of cycling. Fulcrum's innovative designs, use of high-quality materials, and its reputation for quality have made it a popular choice among professional cyclists and enthusiasts.
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