Why MTB Tubeless - patented Six Pawl Cam?
Varenummer: AC-W407-BSD-64-14
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    Our mountain bikers have been successfully riding and racing AC tubeless wheels for the last few years.
    Bill Shook is taking tubeless rim technology to the next level.
    Our tubeless wheels are set up with two AC honey colored tape layers to cover the spoke holes.
    Next, install tubeless ready clincher tires and pump liquid sealant into the system through our proven AC valves.
    The liquid sealant replaces the conventional tube.
    You may ask how our tubeless system works.
    Bill Shook designed the rim with a bead barb running along the edge of the bead shelf.
    When installed, the tire firmly pops into position over the bead barb.
    The tire bead centers and tightly grips the circumference of the rim creating a sealed environment to hold the liquid sealant without burping.
    The number one reason to run tubeless wheels is to avoid flat tires.
    The sealant quickly fills and closes small holes in the tire preventing flats caused by rocks, thorns and other trail debris.
    Pinch flats can not occur because a tube is not needed.
    Our tubeless system is about speed.
    It lowers wheel weight at the extreme outer edge of the rim resulting in lower rolling resistance.
    In a traditional clincher set up, the tire and tube interface moves as the wheel rolls, creating friction and energy loss.
    With the AC tubeless set up, there is no frictional energy loss between the tire and tube because the tube is gone. 
    Liquid sealant is lighter than a tube. You can ride lighter weight tires with our tubeless system because you don’t have to use tires made with heavy, inflexible puncture layers.
    Overall, our tubeless system is lighter and the wheel will spin up faster with less rider energy output.
    And the best part is flat tires are past history.

    One of Bill Shook’s most important designs is his patented Six Pawl Cam Actuated Engagement System found in our hubs. All six oversized pawls engage in unison whenever drive torque is applied. No other multiple pawl system on the market can ensure that all pawls are engaged at the same time. The cam plate powers the pawls into engagement simultaneously. There are new expanded cupped engagement pockets in the cam plate for improved contact. The secondary ratchet system does the coasting quietly and forces engagement of the large pawls only for drive torque transfer. The cassette body has 24 ratchet teeth for quick engagement with the pawls. Each pawl is made from super strong tool steel and has double tips for 12 points of engagement to work in conjunction with the 24 ratchet teeth. The one piece forged 7075 aluminum cassette body is hard anodized and is topped with Bill’s latest steel face body design."Another new trick bit are that the pawls in AC's new hub have twice the contact points of most hubs...that each pawl doubles up its teeth. That's a 12 contact point engagement with 6 pawls, making for 3-4 times the contact points as most hubs..."


    Everybody is talking about wider rims for both road and mountain bike. What does it really mean for you, the rider? There are a few wide rim profiles on the market but they are either heavy, or too light and flexy. Bill Shook used his mathematical abilities to design our revolutionary wide rims, attaining the goal of being light, stiff, strong, aerodynamic and wide, all in one rim. To start, wide rims mean riding lighter, smaller performance tires with cushiony, high air volume and firm surface grip. Larger width tires offer more air volume but they are heavy with a sluggish ride quality. The desired combined wheel and tire qualities are achieved by stretching out the smaller tire casing on a wide rim and effectively ma