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    $459.00 (USD$)


    For real mountain bike performance, the Bolt and Thumper are bang on! Their aluminum frames and quality components will satisfy every kid’s taste for dirt. With their 50mm of travel — more than most! — the Spinner forks offer real damping performance. Plus, their stable geometry ensures these bikes are easy and safe to ride. Even the cranks and saddles are sized specifically for 20” bikes, so you know the fit is as good as the ride.

    • 50mm Spinner fork has more travel and better damping for real trail performance
    • Double-wall alloy rims and Kenda Smallblock 8 tires are light, tough and durable
    • Youth-sized components deliver on fit and safety
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    Frame Opus 6061 Aluminum
    Fork Spinner Grind 50 mm
    Weight (lb) 23.4
    Sizes 20"
    Color(s) Lightning Black
    Shifters SRAM 3.0 Twist 7
    Front Derailleur N/A
    Rear Derailleur SRAM X3
    Brakes Tektro V-Brake
    Brake Levers Tektro Alloy
    Crank Samox Alloy 127 mm
    Chainrings 36
    Bottom Bracket 5 pc Steel
    Cassette Shimano Tourney 14-34
    Chain KMC Z51
    Headset VP Semi-Integrated
    Handlebar Opus Junior 25.4
    Stem Promax 60 mm 15°
    Grips/Tape Opus Kraton
    Saddle Opus Junior
    Seatpost Opus Junior 27.2 x 300
    Wheels/Rims Alex ACE 20
    Hubs Joytech
    Tires Kenda Smallblock Eight 20 x 1.75
    Pedals Wellgo Resin


    Geometry diagram
    Riders's height  
    ± cm
    ± 0"
    Size (cm)
    S - Seat tube (effective center-center in mm) 295
    TT - top tube (effective center-center in mm) 455
    HT - Head tube (mm) 100
    HA - Head angle (mm) 71
    SA - Seat angle (mm) 74
    CS - Chain stay (mm) 390
    D - BB drop (mm) 8
    ST - Stack (mm) 420
    RE - Reach (mm) 334
    SO - Stand over (mm) 524
    Handlebar width (mm) 540
    Stem length (mm) 60
    Crank length (mm) 127
    Geometry diagram
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