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2025 Trek Powerfly FS+ 4 Gen 4 E-Bike

PowerflyFS4-25-48615-A-Primary
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PowerflyFS4-25-48614-A-Portrait
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PowerflyFS4-25-48614-A-Alt1
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Tech Motor
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Related:
Trek
Where To Buy
$70 standard shipping on bikes (continental U.S. only).
$70 standard shipping on bikes (continental U.S. only).
$4,499.99
Free U.S. shipping on everything.
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $69 (continental U.S. only).
International shipping available. Some exclusions apply.

Specifications

Product
Trek Powerfly FS+ 4 Gen 4 E-Bike
Model Year
2025
Intended Use
Cross Country
Trail
Rider
Unisex
Sizes and Geometry
SM
MD
LG
XL
View Full Geometry
Sizes Additional Info
• SM has 27.5" wheels; MD-XL have 29" wheels
• All specifications listed are with 120mm travel fork with 44mm offset
View Full Geometry
Wheel Size
27.5" (650b)
29"
E-Bike Class
Class 1: Pedal Assist (Pedelecs)
Motor
Bosch Performance Line CX, 85 Nm max torque, 250 W nominal power
Battery
Bosch PowerTube, Smart System, integrated, Removable Integrated Battery (RIB 2.0)
Option: Bosch PowerMore 250 Wh range extender
Battery Capacity
Standard: 600 Wh
Option: 800 Wh
Display/Remote
Bosch Purion 200, full-color screen
Modes
Turbo, eMTB, Tour+, Eco, Walk Assist
Max Speed with Assist
USA/Canada/New Zealand: 20 mph (32.19 km/h)
Other: 15.5 mph (24.94 km/h)
Frame Material
Aluminum
Frame Material Details
Alpha Platinum aluminum, molded chainstay protection, Motor Armor
Rear Travel
120mm
Rear Shock
RockShox Deluxe Select R, 210mm length x 50mm stroke
Fork
RockShox Recon Silver RL, Solo Air spring, Motion Control damper, lockout, 32mm stanchions, 42mm offset
Fork Travel
130mm
Head Tube Diameter
Tapered, 1.125" top, 1.5" bottom
Headset
FSA IS-2
Handlebar
Bontrager Comp, alloy, 780mm width, 40mm rise, 31.8mm clamp diameter
Stem
Bontrager Comp, 50mm length, 7° rise, 31.8mm bar clamp, Blendr compatible
Grips
Bontrager XR Trail Comp, nylon lock-on
Brakes
Tektro Gemini SL, 4-piston
Rotors: Tektro, CENTER LOCK, 203mm
Brake Levers
Tektro Gemini SL
Drivetrain
1x
Shifters
Shimano CUES U6000, 10-speed
Front Derailleur
None
Rear Derailleur
Shimano CUES U6000, 10-speed, GS cage
Chainguide
None
Cranks
FSA CK-220 Alloy, 165mm length
Chainrings
FSA, 36 tooth
Pedals
VP-536 nylon platform
Chain
Shimano LG500
Cassette
Shimano CUES LG300, LINKGLIDE, 10-speed, 11-48 tooth
Rims
Bontrager Line TLR 30 Alloy, 28 hole, tubeless ready
Hubs
Shimano TC500 alloy, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with HG driver
Spokes
 
Tires
Bontrager Gunnison Pro XR, dual compound, 60 TPI, tubeless ready, 2.4"
Saddle
Bontrager Verse P3, steel rails
Seatpost
Bontrager Line dropper, MaxFlow
Drop: 100mm (SM), 170mm (MD-XL)
Seatpost Diameter
31.6mm
Seatpost Clamp
Single bolt, 34.9mm
Rear Dropout / Hub Dimensions
12mm x 148mm (Boost)
Max. Tire Size
2.5"
Bottle Cage Mounts
One inside front triangle, plus accessory mounts above down tube
Colors
Pennyflake/Black Olive, Mercury/Dark Web
Warranty
Lifetime frame, 2 years Trek/Bontrager components and paint/decals
Weight
54 lb 3 oz (24,580 g)
Miscellaneous
• Gen 4 version
• Active Braking Pivot (ABP) rear suspension design
• SM has 27.5" wheels; MD-XL have 29" wheels
• Guided internal cable routing
• SRAM UDH (Universal Derailleur Hanger)
• Rack and mudguard/fender mounts
• Weight listed for size MD
• Includes Bosch 2A 110V Smart System charger
• Includes Bontrager TLR rim strips and tire sealant
• Includes rear mudguard/fender
• Power settings customizable via Bosch eBike Flow Mobile App
Price
$4,899.99
More Info

Trek website

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Where To Buy
$70 standard shipping on bikes (continental U.S. only).
$70 standard shipping on bikes (continental U.S. only).
$4,499.99
Free U.S. shipping on everything.
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $69 (continental U.S. only).
International shipping available. Some exclusions apply.
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