Powerfly 4 Black
Powerfly 4 Red

Powerfly 4


This bike expands your boundaries and lets you travel to destinations that you never thought you’d reach on a mountain bike.

Product Description

Powerfly 4 is Trek’s most affordable electric mountain bike. It’s built with parts that hold up. For example, a dependable 9-speed Shimano drive train, a 120 mm SR Suntour fork and a powerful Bosch Performance CX motor. Plus, it also features our user-friendly Removable Integrated Battery (RIB) system. The battery is fully encased in the frame yet doesn’t require tools for removal. This bike expands your boundaries and lets you travel to destinations that you never thought you’d reach on a mountain bike.

Available i 2 colour choices: Matt Trek Black/Quicksand or Matte Radioactive Red/Trek Black

The Powerfly 4 is right for you if…

You’re sold on the e-bike revolution. You also want the capability and versatility of a mountain bike at a price that doesn’t resemble the car you’re trying to use less. You want bigger, better trail adventures and know that an e-MTB with the latest user-friendly tech is the best way to get them.

The tech you get

  • A lightweight and durable Alpha Platinum Aluminium frame that fully encases a long-range 500 Wh battery for sleek looks and protection on the trail,
  • A Bosch Performance CX (250 W, 75 Nm) motor that assists up to 25 km/h,
  • An ergonomic Bosch Purion controller,
  • A Shimano drive train,
  • A 120 mm SR Suntour XCR fork with lockout and
  • Hydraulic disc brakes.
  • Plus, Smart Wheel Sizing means you’ll get the fastest wheel that fits – 29˝ wheels on larger frames, 27.5˝ wheels on smaller frames.

Why you’ll love it

  1. Trek’s Removable Integrated Battery (RIB) system looks great and is super user-friendly. It fully hides the battery in the frame for protection. This makes it easy remove the battery without tools and lets you mount a water bottle cage
  2. This bike expands boundaries. The top-notch Bosch system is equally suited to commuting, recreation and a ridiculously fun time on the trails
  3. The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
  4. It’s equipped with an external charging port for easy charging on or off the bike
  5. It rides like a trail bike because it is one. Powerfly is built according to Trek’s trail heritage with mountain bike tech developed over decades of innovation

The final word on the Trek Powerfly 4

Trek’s most affordable electric mountain bike is equipped with performance parts. Firstly, it has a high-end Bosch motor. It also has a powerful battery and intuitive controller. Therefore giving you confidence and a fun boost on trails and roads.

Additional Information


Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle


SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 120 mm travel


Shimano Altus/Acera


Tektro HD-M275 hydraulic disc


Bosch PowerTube, vertical, 500 wh


Bosch Performance CX, 250 Watt, 75 Nm, 25 km/h max assist


S, M, M/L, L, XL