Why 3 Series /
Great suspension, wide gear range, disc brakes—there's a reason 3 Series is the world's best-selling mountain bike.
Hit light trails, paths, or own the streets on a bike that gives you great control and mountain bike durability. Front suspension, knobby tires… the trail awaits.
Highlights /
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Light, tough frame
A trail ready Alpha Silver Aluminum frame with rack and fender mounts and replaceable, frame-saving derailleur hanger.
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Outstanding warranty
Built to last, and backed by Trek's limited lifetime warranty.
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Perfect fit
The best fitting bike is the best riding bike. Our extended sizing range guarantees that every rider gets the perfect fit.
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Top-quality parts
Shimano drivetrains mean smooth shifting over the long haul.
Super responsive! The 3900's Alpha White Aluminum frame is strong, light, and rigid, which makes for a bike that rips when you stomp on the pedals, maximizing your power. The Shimano parts in the drivetrain offer smooth, solid shifting.
Bicycling
Buyer's Guide
What people are saying /
It makes this rookie feel like a pro! I fell in love with my Trek 3000 Series the day I got it home. At this price, the bike is virtually a steal with all the value that's packed into it. I can't seem to recommend this bike enough. I love it so much.
Trekin
Customer Review
