BMT21831_PH1_01 BMT21831_PH1_02 BMT21831_PH1_03 BMT21831_PH1_04 BMT21831_PH1_05 BMT21831_PH1_06 BMT21831_PH1_07 BMT21831_PH1_08 BMT21831_PH1_09 BMT21831_PH1_10
2021 Medium SKU: BMT21831

Trek Powerfly FS 4 Mountain E-Bike - 2021, Medium

Regular price

return icon 30-day returns
shipping icon $94.99 RideFast Shipping

TPC Guarantee

Every bike receives our white glove, Certified Pre-Owned treatment, including a full pro-tune by our Master Mechanics in Louisville, CO. All CPO bikes are pristine and rolling beautifully before we pack and ship to your door.

- New SUMC chain to optimize crisp shifting.

Master Mechanic's Notes
- Light wear and tear from cable rub, heel rub & chain.
- Light scratch on drive side chainstay & down tube.
- Light scuff on drive side fork lower.
- Moderate scuff on drive side crank arm.
- Moderate scuff on non drive side rear dropout & seatstay.

inspection image

141-Point Inspection

This bike passed our 141-point inspection to qualify to be a Certified Pre-Owned bike. It's free of structural damage and is in excellent cosmetic shape.

Learn more
returns image

30-Day Hassle-Free Returns

Shop with confidence. Every bike is covered by our 30-day satisfaction guarantee. If this bike isn’t perfect for you, get in touch and we’ll help you find the right bike.

Learn more
shipping image

RideFast Shipping

Assemble your bike in 15 minutes or less! Our bikes ship in our RideFast box for speed and safety. All tools you need to assemble are included.

Learn more


Year 2021
Brand Trek
Model Powerfly FS 4
Size Medium
Frame Material Aluminum
Drivetrain Shimano, 1x10 spd
Weight 53 lbs 7 oz
Fork SR Suntour XCR 34
Fork Travel 100mm
Rear Shock SR Suntour Edge R
Rear Shock Travel 100mm
Brakes Tektro HD-M275, Disc Brakes - Hydraulic
Shifters Shimano Deore M4100, Mechanical
Rear Derailleur Shimano Deore M5120
Bottom Bracket Shell N/A
Crankset FSA Bosch CK-220 Alloy, 36t, 165mm
Cassette Shimano Deore M4100, 11-46t
Chain FSA
Handlebar Bontrager Alloy, 740mm
Headset Integrated
Stem Bontrager Alloy, 31.8mm x 70mm, 7°
Seatpost TranzX JD-YSP18, 31.6mm
Seatpost Travel 100mm
Saddle Bontrager Arvada
Front Axle Spacing 15x100mm (Thru-Axle)
Rear Axle Spacing 12x148mm Boost
Wheelset Alexrims MD35 Aluminum Tubeless Ready , Bontrager
Front Tire Bontrager XR3 Comp, 29" x 2.3"
Rear Tire Continental Mountain King Pure Grip Compound , 29" x 2.3"
Tire Type Clincher
Tubeless Compatibility Wheels are tubeless compatible but ships with tubes installed
Motor Bosch Performance CX
Torque 85Nm
Wattage 250 w
Battery Bosch PowerTube 500
Top Speed 20 mph
Mileage 314
Charger Included Yes


Recommended Rider Height 5'3.4" - 5'8.9"
a. Effective Top Tube 589 mm
b. Seat Tube 420 mm
c. Seat Tube Angle 67.5°
d. Head Tube Angle 66.5°
e. Head Tube 130 mm
f. Stack 637 mm
g. Reach 430 mm
h. Standover Height 712 mm
i. Saddle Height Range 575 - 665 mm

“I love this company! My beautiful bike arrived promptly, was packed brilliantly, and tuned perfectly. It was exactly as described.”

— Kari K.


“In the past month, I purchased a road bike and MTB from TPC. Very happy with the price and condition of both bikes! I was riding the bikes 10 minutes after I received them.”

— David H.

Newsletter Sign Up