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Trek 3900 Disc (2012)


Product Category
Brand Trek
Model3900 Disc
Size13, 16, 18, 19.5, 21, 22.5"
ColorMatte Metallic Black/Matte Cool Grey Chi Red


BrakesTektro Novela mechanical disc brakes w/Shimano EF50 levers
CassetteShimano HG31 11-32, 8 speed
CranksetShimano M171 24x34x42T
FeaturesAlpha Silver: Good Our proprietary blend of lightweight aluminum alloy is continuously cold extruded to a single wall thickness. Frames built with Alpha Silver feature some degree of mechanical forming and are finished using Trek's smooth-weld finishing process. 26" wheels The MTB standard for versatility, light weight, and maneuverability. 8-speed The old standby in gearing, for reliability and versatility. Hydraulic disc brakes Hydraulic disc brakes offer the absolute strongest stopping power in all conditions, including wet and muddy.
Fork typeSR Suntour XCM w/30mm stanchions, coil spring & preload, hydraulic lockout, 100mm travel
Frame typeAlpha Silver Aluminum w/semi-integrated head tube, bi-oval down tube w/integrated gusset, rack & fender mounts, disc compatible dropouts, replaceable derailleur hanger
Front derailleurShimano Altus
Headset1-1/8" threadless
Hub frontFormula DC20 front hub
Hub rearFormula DC22 alloy rear hub
PedalsWellgo nylon platform
Rear derailleurShimano Acera
Recommended forMountain, Recreation Mountain
Rims typeBontrager 550 36-hole rims w/brushed sidewalls
SaddleBontrager SSR
ShiftersShimano EF51, 8-speed trigger
StemBontrager Forged, 25.4mm
TiresBontrager LT3, 26x2.0"
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