Bike Comparison
    MSRP
    $429$700
    Where to Buy
    $1

    At

    $700

    At Specialized

    Category
    ComfortComfort
    Weight
    30.5 lbs29.8 lbs
    2.8
    3.2
    AluminumAluminum
    Fork
    SteelSteel
    Wheels
    AluminumAluminum
    Wheel Size
    650b650b
    Brakes
    RimMechanical Disc
    Groupset
    TourneymicroSHIFT, microSHIFT Mezzo
    Drivetrain
    3 × 71 × 7
    Brand Site

    jamisbikes.com

    specialized.com

    Summary
    The Jamis EXPLORER STEP-THRU is a 650b aluminum frame comfort bike with mid-range components and rim 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)

    28 mph

    2019 EXPLORER STEP-THRU

    31 mph

    2023 Roll 2.0

    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

    6061 TIG-welded aluminum, all-new sport comfort design with upright ride position, replaceable derailleur hanger, center-mount kickstand bracket

    Specialized A1 Premium Aluminum, Ground Control Positioning, formed tubes, post-mount disc, fender/rack mounts

    Fork

    Hi-tensile steel unicrown, radius blades with dropout eyelets

    Steel formed tubes, post-mount disc, fender/rack mounts

    Bottom Bracket

    Sealed cartridge, 68 x 110.5mm

    68mm, square taper, 124.5mm length

    Headset

    Internal cup, threaded, 1 1/8”

    Stem

    Jamis alloy, angle-adjustable, 90mm ext x 150mm quill (14–18") or 110mm ext x 180mm quill (19–21”)

    3D-forged alloy, 31.8mm, 7-degree rise

    Handlebar

    Hi-rise comfort, 15D sweep x 80mm rise x 640mm wide

    Specialized Roll, 6061 alloy, Double butted, 15-degree backsweep, 136mm rise, 31.8mm

    Saddle

    Jamis Comfort with extra thick padding, synthetic suede top, burnished side panels and bumper springs

    Specialized Body Geometry Comfort Gel

    Seatpost

    Alloy micro-adjust, 350mm x 27.2mm, with alloy QR clamp

    Alloy, 2-bolt clamp, 27.2mm

    Pedals

    Comfort platform with TPE non-slip insert

    Specialized Body Geometry Fitness, platform, plastic

    Grips

    Kraton comfort

    Slip-on, Closed End Grips

    Groupset
    Rear Derailleur

    Shimano TY300

    microSHIFT RD-M26S, 7-speed

    Front Derailleur

    TY510 top swing/dual pull

    Crank

    Shimano FC-TY501, 48/38/28T, 170mm with chainguard

    Forged aluminum arms, 3-piece, 7 speed, 42T

    Shifters

    Shimano Revoshift, SL-RS35, 21-speed

    microSHIFT TS39 Trigger shift, 7-speed

    Cassette

    Shimano freewheel 7-speed, 14-34

    SunRace, 7-Speed, 11-34t

    Chain

    KMC Z7

    KMC Z7, 7-speed w/ Missing Link™

    Brakes

    ProMax alloy direct pull brakes with Tektro 530-RS levers

    Front: Radius CX7, mechanical disc, 160mm, Rear: Radius CX7, mechanical disc, 160mm

    Wheels
    Rims

    Alloy 36H rims, Formula alloy hubs, QR front and rear, 14g stainless steel spokes

    650b disc, double-wall alloy, pinned, 32h

    Spokes

    Stainless, 14g

    Front Hub

    Alloy, 6-bolt disc, loose ball bearing, quick-release, 32h

    Rear Hub

    Alloy, 6-bolt disc, 7-speed freehub, loose ball bearing, quick-release, 32h

    Tires

    CST - 1918, 27.5 x 2.1

    Front: Nimbus II Sport, 650b x 2.3", Rear: Nimbus II Sport, 650b x 2.3"

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