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    39002012 Trek
    Recommended
    MSRP
    Where to Buy
    —
    $1

    At

    Category
    		Crosscountry
    Frame
    		Aluminum
    Wheels
    		Aluminum
    Wheel Size
    		26″
    		Tektro Rim
    		Tourney, Acera
    Drivetrain
    		3 × 8
    Brand Site
    Summary
    		The Trek 3900 is a 26″ aluminum frame crosscountry bike with modest components and tektro rim brakes.

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    Insights
    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)

    30 mph

    3900

    Highest gear

    (descending)

    Geometry
    Specs
    39002012 Trek
    Frame

    Alpha Silver Aluminum w/semi-integrated head tube, bi-oval down tube w/integrated gusset, rack & fender mounts, disc compatible dropouts, replaceable derailleur hanger

    Headset

    1-1/8" threadless

    Stem

    Bontrager Forged, 25.4mm

    Handlebar

    Bontrager Riser, 25.4mm, 30mm rise

    Saddle

    Bontrager SSR

    Seatpost

    Bontrager SSR, 31.6mm, 20mm offset

    Type: Rigid

    Pedals

    Wellgo nylon platform

    Groupset
    Rear Derailleur

    Shimano Acera M360

    Front Derailleur

    Shimano Altus

    Crank

    Shimano TX M171, 42/34/24

    Shifters

    Shimano EF51, 8 speed

    Cassette

    Shimano HG31 11-32, 8 speed

    Brakes

    Tektro linear-pull brakes w/Shimano EF51 levers

    Type: Tektro Rim

    Wheels
    Rims

    Formula DC20 alloy front hub, RM30 alloy rear hub; Bontrager 550 36-hole rims w/brushed sidewalls

    Tires

    Bontrager LT3, 26x2.0"

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