Powerfly 4 is our most affordable electric mountain bike. Its built with parts that hold up, like a smooth-shifting Shimano drivetrain, and a powerful Bosch motor. Plus, it features our user-friendly Removable Integrated Battery (RIB) system thats fully encased in the frame yet doesnt require tools for removal. This bike expands your boundaries and lets you travel to destinations you never thought youd reach on a mountain bike.

• Treks Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage
• The top-notch new Bosch smart system gives you more control over your ride with navigation and activity tracking through the eBike Flow app
• It comes equipped with Walk Assist and an intelligent e-MTB mode that automatically delivers the right amount of power based on your terrain
• Its equipped with an external charging port for easy charging on or off the bike
• You can boost your Powerflys utility by adding a rack and fenders, plus built-in wiring lets you easily install lights powered by the motor

Removable Integrated Battery

RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. Its the most convenient way to remove your battery for transport, security, or just easier charging.

Bosch Performance Line CX motor

Bosch Performance Line CX sets the standard for eMTB performance with up to 85Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain.

Bosch LED Remote

The Bosch smart system LED remote lets you easily change assist modes, activate walk mode, or turn on optional lights. The bright LEDs are easy to see in any light, and show you your battery level and assist mode at a glance.

Bosch Intuvia 100 display

The Bosch smart system Intuvia 100 display puts your ride data front and center with a large-font high-contrast display thats easy to read in any weather. You get eBike Lock theft protection, and best of all, its completey wireless and connects to the remote via Bluetooth.

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motors assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. Theres even handy features like navigation and service reminders.

Will my bike have a curved top tube?

Smaller frames (S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically dont have the same issues with standover height.

Geometry Chart

XS (27.5″ WHEEL)S (27.5″ WHEEL)M (29″ WHEEL)L (29″ WHEEL)XL (29″ WHEEL)

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