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Trek Powerfly FS 4 Gen 3

Trek Powerfly FS 4 Gen 3
  • Color: Matte/Gloss Black
  • Color: Lava/Trek Black
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Community wide delivery and installation is now available on all residential fitness equipment and bicyles. You may select this option at check out. We highly recommend having our expert staff deliver fitness equipment. Fitness equipment is also availble for pick up. Bicycles and cycling accessories may also be picked at any of our locations by choosing that option at check-out.


Powerfly FS 4 is a full suspension electric mountain bike built to tackle rugged trail adventures. The plush suspension setup soaks up rough terrain, and the powerful Bosch electric drive system boosts your capacity to crush climbs and mile after mile of singletrack.

- For e-MTB, full suspension is a game-changer: it soaks up rugged terrain so you can ride the Bosch pedal-assist smart system to its full potential
- Trek's 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 to remove the battery without tools, and lets you mount a water bottle cage—even on full suspension e-MTBs
- The dropper post lets you lower your saddle on the fly so it's out of the way on descents
- It comes equipped with Walk Assist and an intelligent e-MTB mode that automatically delivers the right amount of power based on your terrain
- Powerfly FS frames feature a curved top tube that makes standing over the bike easier. Plus, Smart Wheel Sizing means you'll get the fastest wheel that fits—29" wheels on larger frames, 27.5" wheels on smaller frames

Geometry Chart:
Wheel size 27.5" 27.5" 29" 29" 29"
A — Seat tube (cm) 36.8 39.5 42 45 50
B — Seat tube angle 68.3° 68.3° 67.5° 67.5° 67.5°
Effective seat tube angle 76.0° 76.0° 76.0° 76.0° 76.0°
C — Head tube length (cm) 14 14 13 14 14
D — Head angle 66.5° 66.5° 66.5° 66.5° 66.5°
E — Effective top tube (cm) 55.4 56.4 58.9 62.1 64.6
F — Bottom bracket height (cm) 33.2 33.2 33.5 33.5 33.5
G — Bottom bracket drop (cm) 2.4 2.4 3.9 3.9 3.9
H — Chainstay length (cm) 46.8 46.8 47 47 47
I — Offset (cm) 4.4 4.4 4.4 4.4 4.4
J — Trail (cm) 10.7 10.7 11.4 11.4 11.4
K — Wheelbase (cm) 117 118 120.6 124 126.5
L — Standover (cm) 69.1 69.1 71.2 71.6 71.3
M — Frame reach (cm) 40.5 41.5 43 46 48.5
N — Frame stack (cm) 59.9 59.9 63.7 64.6 64.6
SizeHeight (cm)Height (in)
XS145 - 155cm 4'9" - 5'1"
S155 - 165cm 5'1" - 5'5"
M165 - 176cm 5'5" - 5'9"
L177 - 188cm 5'10" - 6'2"
XL188 - 195cm 6'2" - 6'5"


Motor Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm
Pedals Wellgo VPE-536
Battery Bosch PowerTube 500Wh, smart system
Charger Bosch standard 4A, 110V, smart system
Controller/Display Bosch Intuvia 100, smart system
Fork SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 41mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru axle, 100mm travel
Hubs Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Rims Alex MD35, tubeless compatible, 32-hole, 35mm width, Presta valve
Stem Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length
Chain KMC X10, 10 speed
Frame Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armor, rocker link, rack and fender mount, ABP, Boost148, 100mm travel
Tires Bontrager XR3 Comp, wire bead, 30tpi, 27.5x2.35''
Rotors Tektro, 6-bolt, 203mm
Saddle Bontrager Arvada, steel rails, 138mm width
Headset FSA IS-2
Crankset FSA Bosch CK-220, 36T ring, 165mm length
Seatpost TranzX JD-YSP18, 100mm travel, internal routing, 31.6mm, 361mm length
Shifters Shimano Deore M4100, 10 speed
Chainrings FSA, 36T, steel
Handlebars Bontrager alloy, 31.8mm, 15mm rise, 720mm width
Rear Shock SR Suntour Edge R, 190mm x 45mm
Tape/Grips Bontrager XR Trail Comp, nylon lock-on
Rear Derailleur Shimano Deore M5120, long cage
Cassette/Freewheel Shimano Deore M4100, 11-46, 10 speed

* Subject to change without notice.