Trek Marlin 4 27.5" MTB 21-Speed 2022 Unisex

The Marlin 4 is the ideal entry point to trail riding. It's perfect for new mountain bikers who want a bike with knobby tires that can also handle commutes around town. Disc brakes, front suspension, 21 speeds, and mounts for a rack and fenders make this an ideal choice for both trail newbies and campus commuters.

It's right for you if...

You want your first real mountain bike at a value-focused price, but you also want a commuter that's sturdy enough to hop curbs on the way to class.

The tech you get

A lightweight aluminum frame with internal routing to protect your cables and add to the bike's sleek look, 21 speeds, a wide range of gearing to ensure you're never pedaling too hard or too easy on varied terrain, powerful mechanical disc brakes, and a suspension fork that takes the edge off bumps and rough terrain.

The final word

Marlin is built for any adventure. The rack and fender mounts make it a great choice for daily commuters who want to get to class or run errands.

avorite_borderYou'll love it

1. It’s a real mountain bike that’s also perfectly suited for daily commutes, rides across campus, or just getting from A to B on any surface
2. Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
3. Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently
4. Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easy for shorter riders to hop on and off
5. Like every model in the Marlin family, it's backed by Trek's lifetime warranty

Will my bike have a curved top tube?

Smaller frames have a top tube that dips down as it approaches the seat tube. This design creates a lower standover height, which is good for shorter riders because it allows them to straddle the bike more easily. The larger frames have a straight top tube because taller riders with longer legs typically don't have the same issues with standover height.

A fit for every rider

Marlin comes in seven frame sizes to suit riders of any height, and Smart Wheel Size ensures you’re on the fastest wheel that fits. The smallest sizes even get brake levers with a shorter reach and narrower handlebars that give smaller riders more comfort and control.

High-tech at a great value

Marlin looks and feels great. It’s packed with features usually found only on more expensive bikes, like a stylish frame with internal shift and brake cable routing, which can help your cables last longer by protecting them from the elements.