The real deal
4 Series takes its cue from light, fast XC bikes. Dialed geometry, race-inspired tech, and unbeatable ride feel make this an excellent platform for trail riders on a budget.
When you're ready for longer days on the bike, for tougher challenges on the trail, for the full mountain biking experience, you're ready for 4 Series.
Race-bred tech makes for a better ride, giving you the benefit of years of Trek high-end XC development.
XC light, mountain tough
Hydroformed Alpha Aluminium frame is race light, mountain strong, and ride tuned for peak performance.
Our extended size range guarantees a better fit, so you get a better ride.
Limited lifetime warranty
These bikes are built to last, and backed by Trek's limited lifetime warranty.
What people are saying
The 4300's frame has nice lines thanks to its formed tubing, and it's strong and stiff courtesy of gusseting in key areas. Trek uses lightweight Alpha Black Aluminum on the 4300 to keep its weight to a minimum.
I would buy this bike again and again. The lockout suspension is awesome, the brakes are awesome, the price is awesome. Everything about this bike is awesome—I can't find one bad thing about this bike