Features /

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.

Upgrades from 3700 Disc

  • Hydraulic fork lockout
  • Shimano M171 crank
  • Tektro HDC 300 hydraulic disc brakes
  • Oversized stem & handlebar

Alpha Silver Aluminum

Trek’s durable, straight-gauge performance aluminum.

26" wheels

The original 26" mountain bike wheel size is now the smallest of three available diameters. It’s the most flickable, most playful wheel size.

Extended size range

A wider range of sizes than the industry standard provides more option for everyone, from tallest to shortest and all those in between. Because everyone deserves a great ride.

Hydraulic disc brakes

Ultimate control and stopping power in all conditions, including wet and muddy.

Oversize stem and handlebar

31.8mm oversize clamp diameter increases stiffness for more confident, precise handling.

Rack & fender mounts

Built-in mounts make it easy to add racks and fenders for added versatility.

Suspension fork

Shock-absorbing fork allows the front wheel to travel up and down over bumps while the handlebars stay steady, for a comfortable, controlled ride.

Suspension lockout

Lock out the suspension fork for efficient riding on smooth terrain.

Trail Ready

Every Trail Ready frame is certified for off-road use.