Aspen ST

    Aspen ST

    • XC (Cross Country)

    The Aspen ST is an ultra-low-profile race tire designed primarily for short track XC use. Sometimes referred to as the “Fastpen,” this tire is sure to give any racer an edge in dry conditions.

    • Rubber:
      • MaxxSpeed
    • Casing:
      • 120 TPI + EXO (XC Race)
      • 170 TPI + EXO Team Spec (Ultra Lightweight XC)
    • 2.40″ Wide Trail (WT) sizes are optimized for 30mm inner width rims
    • Tubeless Ready (TR)

    Category: XC Race

    Recommended Uses: Dry XC Conditions

    Recommendation Installation: Front or rear

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    Performance Ratings

    Rolling Speed

    Cornering Control

    Braking Traction

    Specs

    Part #
    Size
    ETRTO
    TPI
    Bead
    Weight (g)
    Compound
    Max PSI
    Tech
    Color
    29
    29X2.25
    TB00523300
    29X2.25
    57-622
    120
    FOLDABLE
    670
    MAXX SPEED
    50
    MaxxSpeed/EXO/TR
    Black
    29X2.25
    TB00523400
    29X2.25
    57-622
    170
    FOLDABLE
    610
    MAXX SPEED
    50
    MaxxSpeed/EXO/TR
    Black
    29X2.40
    TB00523500
    29X2.40
    61-622
    120
    FOLDABLE
    750
    MAXX SPEED
    50
    MaxxSpeed/EXO/TR
    Black
    29X2.40
    TB00523700
    29X2.40
    61-622
    170
    FOLDABLE
    685
    MAXX SPEED
    50
    MaxxSpeed/EXO/TR
    Black
    Available Technologies

    Available Technologies

    MaxxSpeed

    The new MaxxSpeed (2023) is our top-shelf rubber compound for XC racing. It’s a high-silica content compound which reduces rolling resistance while also enhancing wet traction. Compared to the previous 3C MaxxSpeed, the new compound has approximately 25% less rolling resistance in a lab setting (using the same tread pattern, construction, and tire pressure). In a real world setting, our testing shows the new compound can save up to a minute over the course of a 90-minute race.

    Cutaway section of bike tire. Maxxspeed.

    EXO

    EXO is a cut- and abrasion-resistant material added to the sidewalls of many Maxxis mountain bike and gravel tires. This densely woven fabric is lightweight and highly flexible, ensuring that the performance of the tire remains unaffected. Choose EXO Protection for enhanced durability for gravel, XC, and light-duty trail riding.

    EXO Cutaway for web

    Tubeless Ready

    Tubeless ready tires provide the rider with many benefits: the ability to run lower air pressures, which improves traction; lower rolling resistance when compared to a tube-type tire; and less chance of flatting because there is no tube. Tubeless ready tires are denoted by the letters “TR” on the sidewall.
    Tubeless ready tires must be mounted to tubeless compatible rims and require the use of a liquid sealant to maintain pressure. Liquid sealants have the added benefit of sealing small punctures. Be sure to check your sealant regularly and refresh as needed as it will dry out over time.
    Liquid sealants should only be used in the following types of tires: tubeless road, tubular, and tubeless ready. The use of liquid sealants in any other Maxxis tire will void the warranty.
    Tubeless Ready Maxxis Shorty bicycle tire.

    Wide Trail XC (WT XC)

    Maxxis recommends using 2.40″ Wide Trail XC tires on 30mm internal rims. The tires are compatible with rims as narrow as 25mm, but we do not recommend exceeding 30mm wide.

    Diagram of recommended 6 millimeter clearance for seat stay, fork, seat tube, bottom bracket, and chain stay.

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