The trail starts here
3 Series is your weekend trail bike, your workday commuter, or both. Versatility, great suspension, smart spec… it's no wonder 3 Series is the world's best-selling mountain bike.
Can't decide between a trail bike and a commuter? Get both, in one bike. 3 Series gives you confidence, control, and road-to-trail versatility, wherever you ride.
Light, tough frame
Trail-ready Alpha Aluminium frame is rack and mudguard ready for daily practicality.
Our extended size range guarantees a better fit, so you get a better ride.
Shimano drivetrains and Bontrager components mean smooth gear shifting and performance you can count on over the long haul.
Limited lifetime warranty
These bikes are built to last, and backed by Trek's limited lifetime warranty.
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.
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.