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    3900 Disc2015 Trek
    Recommended
    MSRP
    Where to Buy
    —
    $1

    At

    Category
    		Crosscountry
    Frame
    		Aluminum
    Wheels
    Wheel Size
    		26″
    		Tektro Hydraulic Disc
    		Acera, Altus
    Drivetrain
    		3 × 8
    Brand Site
    Summary
    		The Trek 3900 Disc is a 26″ aluminum frame crosscountry bike with modest components.

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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 Disc

    Highest gear

    (descending)

    Geometry
    Specs
    3900 Disc2015 Trek
    Frame

    Alpha Silver Aluminum w/semi-integrated head tube, rack & fender mounts

    Headset

    1-1/8" threadless

    Stem

    Bontrager SSR, 31.8mm, 10 degree

    Handlebar

    Bontrager Riser, 31.8mm, 15mm rise

    Saddle

    Bontrager Evoke 1

    Seatpost

    Bontrager SSR, 2-bolt head, 31.6mm, 12mm offset

    Type: Rigid

    Pedals

    Wellgo nylon platform

    Groupset
    Rear Derailleur

    Shimano Acera M360

    Front Derailleur

    Shimano M190

    Crank

    Shimano M171, 42/34/24

    Shifters

    Shimano Altus M310, 8 speed

    Cassette

    Shimano HG31, 11-32, 8 speed

    Brakes

    Tektro HDC 300 hydraulic disc brakes

    Type: Tektro Hydraulic Disc

    Wheels
    Tires

    Bontrager LT3, 26x2.0"

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