Whether you're cruising the local trails or simply enjoying streets and bike paths for fitness and fun, the 3900 Disc is the perfect ride. Trek's Silver aluminum frame is light, tough and responsive, and the 100mm suspension fork with preload adjust allows fine tuning to a rider's weight. Mechanical disc brakes give predictable performance in all conditions and keep you in control in even the fastest descents. The 3900 will bring you cycling joy for years to come.
Frameset
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
Front Suspension: SR Suntour XCM w/30mm stanchions, coil spring & preload, 100mm travel
Wheels
Wheels: Formula DC20 alloy front hub, DC22 alloy rear hub; Bontrager 550 36-hole rims w/brushed sidewalls
Tires: Bontrager LT3, 26x2.0"
Drivetrain
Shifters: Shimano EF51, 8 speed
Front Derailleur: Shimano Altus
Rear Derailleur: Shimano Acera M360
Crank: Shimano TX M171, 42/34/24
Cassette: Shimano HG31 11-32, 8 speed
Pedals: Wellgo nylon platform
Components
Saddle: Bontrager SSR
Seat Post: Bontrager SSR, 31.6mm, 20mm offset
Handlebars: Bontrager Riser, 25.4mm, 30mm rise
Stem: Bontrager Approved, 25.4mm
Grips: Bontrager SSR
Headset: 1-1/8" threadless
Brakeset: Tektro Novela mechanical disc brakes w/Shimano EF51 levers