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Description
Powerfly 4 Description
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.
Its right for you if…
Youre sold on the e-bike revolution and want the capability and versatility of a mountain bike at a price that doesnt resemble the car youre trying to use less. You want bigger, better off-road adventures, and know an e-MTB with the latest user-friendly tech is the best way to get them.
The tech you get
A tough yet refined aluminum frame that fully encases a long-range 500Wh battery for sleek looks, a Bosch Performance CX (250W, 75Nm) motor that assists up to 20 mph or 32 km/h, a Bosch Purion controller, a 1×10 Shimano drivetrain, an 80mm SR Suntour fork with lockout, and hydraulic disc brakes. Plus, Smart Wheel Sizing means riders of every size get a great fit—29″ wheels on larger frames, 27.5″ wheels on smaller frames.
The final word
Our most affordable electric mountain bike comes with the same powerful Bosch motor and intuitive controller as our most expensive e-bikes, with a smaller battery and parts chosen to give you great value.
Why youll love it
– 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
– This bike expands boundaries: the top-notch Bosch system is equally suited to commuting, recreation, and a ridiculously fun time on the trails
– The Purion controller has Walk Assist and an intelligent eMTB 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 Powerfly’s utility by adding a rack and fenders, plus built-in wiring lets you easily install lights powered by the motor
Wheel size:
Sizes X-Small – Small: 27.5-inch
Sizes Medium – X-Large: 29-inch
GEOMETRY of the Powerfly 4
SIZING
WILL MY BIKE HAVE A CURVED TOP TUBE?
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 don’t have the same issues with standover height.
SPECS of the Powerfly 4
| Frame | Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle |
|---|---|
| Fork | SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 80mm travel |
| Rims | Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve |
| Hubs | Front: Formula DC-511, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle |
| Spokes | 14g stainless steel |
| Tires | Bontrager XR3 Comp, wire bead, 30tpi |
| Crankset | FSA Bosch CK-220, 36T ring, 165mm length |
| Shifters | Shimano Deore M4100, 10 speed |
| Rear Derailleur | Shimano Deore M5120, long cage |
| Cassette/Freewheel | Shimano Deore M4100, 11-46, 10 speed |
| Chain | KMC X10, 10 speed |
| Brakes | Tektro HD-M275 hydraulic disc |
| Rotors | Tektro, 6-bolt, 203mm |
| Handlebars | Bontrager alloy, 31.8mm, 15mm rise |
| Tape/Grips | Bontrager XR Endurance Comp, lock-on |
| Stem | Bontrager alloy, 31.8mm, Blendr compatible, 7 degree |
| Headset | FSA IS-2, 1-1/8” top, 1.5” bottom |
| Seatpost | Bontrager alloy, 31.6mm, 12mm offset |
| Pedals | VP-536 nylon platform |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist |
| Battery | Bosch PowerTube 500Wh |
| Controller/Display | Bosch Purion |
| Charger | Bosch compact 2A, 100-240V, smart system |
* Subject to change without notice.
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