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Mcfk carbon rim MTB 27.5'/650B 25mm 28H

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This item is crafted in Germany
  • The target of the development was nothing less than providing the best rim for fast and light-weight bikes. Nothing but the best. For this purpose, we matched every parameter, every detail of the rim meticulously and did our utmost to develop the very finest for you.

    Carbon for the rim
    In contrast with aluminium, the advantage of carbon is that it stays in form. Thus, recentering, height and lateral runouts are things of the past. Once spoked properly, the wheel will not change shape or run.

    Multiple layer design
    No two types of carbon are alike. The layer design is the decisive aspect – the orientation of the fiber is the most important thing in any part made of carbon. For this reason, we use a complex mixture of fabric and unidirectional (UD) layers which are positioned exactly in the right direction to ensure that we get the best performance of the material and leave no potential unused.

    Monocoque design
    Avoiding weak points was one of the central focal points in the development. Whereas our competitors make the rim by bonding several parts together, our rim is laminated of a single piece and cured. This involves a higher input of time and effort and requires extensive know-how but adds stability, saves weight and produces a homogeneous rim.

    35 mm outside width
    The wider the rim profile, the higher the lateral stiffness of the wheel. The flexural rigidity increases disproportionately (to the third power) of the width of the profile. Our oversize rim profile on downhill rim level obtains stiffness never before attained with wheels of this weight class.

    29 mm height
    To ensure high radial stiffness of the rim, a profile of sufficient height is needed to avoid radial load such as root carpets, bumps and bottoming from causing local bends and loss of tension of spokes.

    3.5 mm asymmetry
    A very important aspect of the outstanding stability of our wheels is the distinct asymmetry of 3.5 mm. 3.5 mm asymmetry is the reason why the difference of the inevitably non-symmetrical position of the hub flanges to the hub center is reduced by 7 mm. This ensures uniform spoke tension on both sides of the wheel.

    25 mm inside width
    Wide tires require a wide rim. Both should make a good match otherwise the tire tends to cant and does not instill confidence while riding.

    Rim flange with extra stability
    The unique ratio of outside and inside widths also adds extra stability, width and solidity to the wheel flange. Bottoming – the enemy of any light-weight rim – need no longer be dreaded and so the life of our carbon rims is extended.

    Laminated spoke holes
    Another very important advantage of our rims is the pre-compacted, laminated spoke holes, which are not drilled. This means no cutting of fibers, no limitation of spoke tension and therefore even more stability for the wheels. Besides, it gives the rim reliable protection from spoke tear-out in the case of a fall. You simply have to replace a couple of spokes but never the complete wheel.

    Preformed ball head nipple tip
    To ensure a perfect fit of the nipples in the rim, they need the right nipple seat. Because we do not drill the spike holes but compress and laminate them, we can shape a perfect ball head in the rim.

    Tubeless-type rim well
    The days of „good-weather“ hoses are numbered. With our specially shaped rim well you can use any kind of tire. We most of all recommend the tubeless(-ready) models.

    4mm deep well
    To enable you to change tires without a tool as far as possible, we have made the deep well extra strong so you need less power and go easy on the material when mounting the tire.

    Weight: 325 grams in 27.5“
    The grand total of all parameters: the weight, stunning 325 grams.
    The combination of outstanding stiffness, innumerable detail solutions and the lowest weight makes our rim what it is: the best one for fast and light-weight bikes.

    Material:Carbon Prepreg
    Design:UD Matt3K - Matt
    Range of use:MTB
    Brake system:Disc only
    Tire:Tubeless, Tubeless Ready, folding tire, wired-on tire
    ERD:27,5" - 542 mm
    Asymmetry:3,5 mm
    Width inside:25 mm
    Width outside:35 mm
    Spoke holes:28
    Max. system weight:125 kg
    Weight:335 g
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