ethirteen Grappler 2.5 in. Aggressive Tread Tire

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Tame the most technical trails with the ethirteen Grappler 2.5 in. Aggressive Tread Tire. The center tread digs into chunder and distributes pressure evenly for grip on even the steepest slabs.

  • Features

    • Tread is designed with tall, strategically siped knobs to give the most bite and control in loose, loamy or wet conditions; knobs are generously spaced to avoid trapping mud
    • Center knobs feature parallel sipes for added stability while transitioning from straight line to cornering; perpendicular sipes add generous braking traction
    • Tapered transitional knobs maintain grip at intermediate lean angles, generating a smooth transition into the hard-biting side knobs for consistent, predictable cornering
    • Side knobs feature angled sipes, softening the corner of the knobs and bolstering traction when cornering; arched cutaways increase flexibility
    • Accordion sipes control deformation of the side knobs at extreme lean angles and allow the knobs to find their home in uneven, rough terrain
    • Knob designs are engineered to reduce fold-over for positive cornering at aggressive lean angles
    • Single-ply nylon Trail casing features a built-in nylon breaker for puncture resistance; a tubeless insert helps with air retention
    • MoPo compound is soft, high-tack and slow-rebound, letting your attack wet roots and slick rock with confidence and control
    • Note: Tire images shown may not reflect size/color/material options available on this page


    View all ethirteen Mountain Bike Tires
  • Technical Specs

    Best Use

    Mountain Biking

    Wheel Size

    27.5 IN x 2.5 IN: 27.5 inches

    29 IN x 2.5 IN: 29 inches

    Tire Width

    2.5 inches

    Foldable Tires




    Thread Count Casing (tpi)

    120 threads per inch

    Tread Type

    Knobby Tread

    Bead Type


    Recommended Pressure (psi)

    Max 40 pounds per square inch


    1,150 grams

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