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 upright confidence, control, and road-to-trail versatility, wherever you ride.
Light, tough frame
Trail-ready Alpha Aluminum frame is rack and fender 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 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.