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Trek Powerfly 4
$2,299
$4,999new-54%
Sold
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Why we love it
The Trek Powerfly 4 is a versatile and rugged electric mountain bike built for riders who crave adventure on and off the trails. Featuring a durable aluminum frame and a seamlessly integrated mid-drive motor, this e-MTB provides smooth and consistent pedal assistance, making steep climbs and rough terrain more manageable.
Top features
High-performance, reliable, top of the line engine for powerful assistance on all types of terrain
Top 10 best-selling electric bike brands from Upway
High-capacity battery for long range
Specifications
General
Brand: Trek
Model: Powerfly 4
Usage: Mountain bike
Mountain bike category: Hardtail
Color: Black
Year: 2021
Mileage: 896 mi
Weight: 53 lb
Frame type: Closed
Sizing
Manufacturer's size: L (ideal for people between 5ft 10in and 6ft 2in)
Seat tube length: 47 cm
Stand-over height: 88 cm
Equipment & Accessories
Double kickstand: No
Rack position: Rear
Electrical
Battery
Condition: Original
Battery capacity: 625 Wh
Number of cycles of battery charge: 24
Battery location: Frame
Battery removable: Yes
UL certified: Yes. Available for purchase anywhere in the US.
Motor
Brand: Bosch
Model: Performance Line Speed
Engine location: Mid-drive
Engine torque: 85 Nm
Product Reference: BDU490P
Engine power: 250 W
Assistance type: Pedal
Max speed: 20 mph
e-Bike class: Class 1
Display
Display model: Purion
Mechanical
Frame & Suspensions
Fork model: SR Suntour Zeron 35
Drivetrain & Braking
Shifting: Derailleur
Transmission: Chain
Derailleur model: SRAM NX Eagle
Number of speeds: 12
Brakes: Disk | Hydraulic
Wheels & Tires
Wheels size: 29"
Tires: Bontrager XR3 Comp (56-622)
Dropper post: Yes
History and Inspection Report
Inspection
All our bikes go through a 50-point inspection and are refurbished by professional mechanics.
Trek Powerfly 4 (2021)
Frame, drivetrain, braking system, wheels, tires and suspensions inspected and tested
Fixed or repaired : tyres
Battery, motor and display diagnosed and in healthy condition
Software up-to-date
Test ride, deep cleaning and final quality control check
This bike has been inspected and tested in Los Angeles in July 2026.
Documents
Ownership history
This Trek Powerfly 4 was sold to us directly from an individual in June 2026.
Mechanic's note
This bike is in very good condition. There are some light scratches on the frame and other components.
Additional notes
Note that dropper posts usually have a slight side-to-side play.
Warranty and Protection
Included with your bike
Optional coverage available at checkout
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Frequently asked questions
Yes you can contact us via our chat (from 9am to 6pm ET), via email at helpdesk@upway.shop or you can schedule a call with one of our Upway experts using this link.
A large percentage of our stock is actually brand new. In many cases, we get these bikes still-in-box from both manufacturers and bike shops as overstock. While you will typically not be eligible for manufacturer warranty for these bikes, this is how we are able to offer them at such a steep discount. You can find all our new bikes here.
Yes! A professional bike mechanic has repaired, inspected, and certified your electric bike, meaning we are happy to offer a 1-year warranty that covers mechanical and electrical defects. If you experience any problems within the next 12 months receipt of your bike, please contact us via email: helpdesk@upway.shop.
If you would like, you can purchase a more robust warranty through our partner, Extend. You can read more about Extend's warranty here.
No. Your sales taxes will be calculated at check-out and vary per state. At the same time, you may not see any sales taxes applied to your purchase. If you have any questions, don't hesitate to reach out to helpdesk@upway.shop or via our chat.
Yes! The pictures you are seeing on the product page are the pictures of the exact bike you will receive if you purchase it. At Upway we truly believe in transparency and trust, so we decided to take the time to have at least 7 pictures of each bike we have in stock so that you know exactly what you are buying. If you have any questions or if you want more pictures, don't hesitate to reach out at helpdesk@upway.shop or via our chat.
Yes! You will receive the key(s), charger(s), all the accessories you see on the pictures if there are some (rack, basket, bag, etc except the bike stand in the photo) and the user guide if we have it.
Upway lets you choose to receive your bike either in 15-minute assembly or 5-minute assembly options. You can also select additional preferences for delivery speed and appointment choice. Shipping starts at $99 but varies by model (some bikes aren’t eligible for the 15-minute assembly). You can find more info on this page.
Please be assured that Upway has your back in case of any shipping damage. We generally recommend that customers do not refuse shipments. Upway will then credit you back a fair amount for any aesthetic, permanent damages such as scratches, and cover any repairs for functional damage.