Bike Comparison
    MSRP
    $689$420
    Where to Buy
    $1

    At

    $420

    At Giant

    Category
    Mountain YouthMountain Youth
    3.5
    1.9
    AluminumAluminum
    Fork
    Suntour XCM (air)Steel
    Wheels
    AluminumAluminum
    Wheel Size
    20″20″
    Brakes
    Hydraulic DiscRim
    Groupset
    X4, X5Tourney, Shimano
    Drivetrain
    1 × 91 × 7
    Suspension
    HardtailRigid
    Front Travel
    80mm-
    Brand Site

    bikes.com

    giant-bicycles.com

    Summary
    The Rocky Mountain Vertex Jr 20 is a 20″ aluminum frame mountain youth bike with mid-range components and hydraulic disc brakes.
    Similar Bikes
    Accessories
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    15 mph

    2020 Vertex Jr 20

    14 mph

    2024 Talon 20 Lite

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Frame

    Rocky Mountain 6061 SL Alloy. Threaded BB. Zero Stack Headtube. 20" Kid's Geometry

    BB StandardBSA, Threaded

    ALUXX-grade aluminum

    BB StandardBSA, Threaded

    Fork

    Suntour XCM JR Air 80mm

    high-tensile steel, rigid

    Shock

    N/A

    Bottom Bracket

    SR Suntour Sealed Cartridge Bearing

    semi-cartridge

    Headset

    FSA No. 10P

    Stem

    Rocky Mountain XC

    forged alloy Ahead, 10-degree

    Handlebar

    Rocky Mountain XC 600mm

    Giant Kids, alloy, 31.8mm, 10-degree rise, 60mm, custom taper design

    Saddle

    Rocky Mountain Pivotal Kids

    Explora Jr.

    Seatpost

    Rocky Mountain Pivotal 27.2mm

    alloy, single-bolt, 27.2x250mm

    Pedals

    Composite Kids

    platform

    Grips

    Rocky Mountain Slide On Kids

    Giant Junior, custom taper design

    Groupset
    Rear Derailleur

    SRAM X4 9 Spd

    Shimano Tourney

    Front Derailleur

    N/A

    Crank

    Rocky Mountain Microdrive 28T

    alloy, 32t, 140mm

    Shifters

    SRAM X5

    Shimano REVOSHIFT, 1x7

    Cassette

    SunRace CSM98 11-36T 9 Spd

    14x34

    Chain

    KMC X9

    KMC HV500

    Brakes

    Shimano MT200 2 Piston

    alloy, linear pull

    Brake Levers

    Shimano MT200

    alloy, junior MTB

    Wheels
    Rims

    WTB SX17

    Giant Kids 20", alloy

    Spokes

    2.0 Stainless

    stainless, 14g

    Front Hub

    Shimano TX505

    nutted, 28h

    Rear Hub

    Shimano TX505

    nutted, 28h

    Tires

    VeeTire Crown GEM 20x2.25

    Giant Junior Sport, 20x1.95", 22 tpi

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