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2011 Trek

3900 Disc

A 26″ aluminum frame crosscountry bike with modest components and tektro mechanical disc brakes.

FrameAluminum
Wheels26″ Aluminum
Drivetrain3 × 8
GroupsetAcera, Altus
BrakesTektro Mechanical Disc
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Insights
Gearing

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

27 mph

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Highest gear

(descending)

Specs
Build
Frame

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

Headset

1-1/8" threadless, semi-integrated, semi-cartridge bearings

Stem

Bontrager Approved, 25.4mm

Handlebar

Bontrager Approved Riser, 25.4mm, 30mm rise

Saddle

Bontrager SSR

Seatpost

Bontrager SSR, 31.6mm, 20mm offset

TypeRigid

Pedals

Wellgo nylon platform

Groupset
Rear Derailleur

Shimano Acera

Front Derailleur

Shimano M190

Crank

Shimano M171, 42/34/24

Shifters

Shimano EF51, 8 speed

Cassette

SRAM PG-820 11-32, 8 speed

Brakes

Tektro Novela mechanical disc brakes w/Shimano EF50 levers

TypeTektro Mechanical Disc

Wheels
Rims

Formula alloy DC20 front hub, Shimano alloy M475 rear hub; Bontrager 550 36-hole rims w/brushed sidewalls

Tires

Bontrager LT3, 26x2.0"

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First added June 29

Last updated June 29

Not listed for 3,256 days