Trek Powerfly FS+ 4 Gen 4

Powerfly FS+ 4 is a full-power full suspension electric mountain bike for taking on alpine adventures. Its Alpha Platinum Aluminum frame pairs with a RockShox Deluxe suspension package (120mm rear, 120mm front) to smooth out rough trails, while a 10-speed Shimano CUES drivetrain provides simple, low maintenance shifting. Tektro Gemini SL 4-piston hydraulic disc brakes give you stopping power at a great value.

• Powerfly FS+ gives you the powerful boost you crave on high alpine climbs, confident comfort on descents, and a big battery for getting way out there
• Bosch's Performance Line CX motor delivers plenty of torques for steep, punchy climbs, and is easy to control with the Purion 200 remote – plus you can customize it in the eBike Flow app
• Its RIB 2.0 removable integrated battery is easy to remove for travel and storage, and virtually rattle-free while you ride
• Want even more boost? With the Bosch e-Bike Flow app, you can increase torque to 100Nm and peak power up to 750W.
• It's compatible with Bosch PowerMore booster batteries, and you can even upgrade the 600Wh battery for a bigger 800Wh option to get way out there. Both parts can be retrofitted by the dealer

New RIB 2.0

Removable Integrated Battery (RIB 2.0) makes it easy to remove your battery for more convenient charging or traveling, and you don't have to worry about dropping it thanks to a secondary safety catch.

Extend your ride

Wanna take your ride even farther? Pair a 250Wh PowerMore range extender with your bike to chase your most epic adventures.

Light, quiet, powerful: 100Nm upgrade ready

Bosch's Performance Line CX motor has 85nm of torque out of the box but can be tuned all the way up to 100Nm and 750 watts of power using the Bosch eBike Flow app, the all new Bosch CX motor is lighter, quieter, and now more powerful than ever without wavering on natural-feeling support for crushing epic rides.

Massive range for epic rides

Bosch's new 800Wh battery gives you enormous range for chasing down your greatest adventures — or, you can swap to a 600Wh option for a lighter-weight ride with more nimble handling.

Customize your ride

Get more utility and sleek integration with mudguards and a rack designed specifically for Powerfly, so you can customize your setup for everyday needs or epic exploration.

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motor's assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. There's even handy features like navigation and service reminders.

Frame	Alpha Platinum Aluminum, Removable Integrated Battery (RIB 2.0), tapered headtube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34.9mm seat tube, ABP, UDH, rack and mudguard mounts, Boost 148, 120 mm travel
Fork	RockShox Recon Silver RL, Solo Air, Motion Control damper, lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
Shock	RockShox Deluxe Select R, 210x50mm
Tire	Bontrager Gunnison Pro XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40''
Tire Part	Bontrager TLR sealant, 6oz
Hub Front	Shimano TC500 alloy, centerlock, 110x15mm thru axle
Hub Rear	Shimano TC500 alloy, centerlock, 148x12mm thru axle
Rim	Bontrager Line TLR 30, Tubeless Ready, 28-hole, Presta valve // Bontrager Line TLR 30, Tubeless Ready, 32-hole, Presta valve
Rim Strip	Bontrager TLR
Skewer Rear	Bontrager Switch thru axle, removable lever
Shifter	Shimano U6000, 10 speed
Rear Derailleur	Shimano CUES U6000 GS
Crank	FSA Bosch CK-220, 36T ring, 165mm length
Cassette	Shimano CUES LG300, LINKGLIDE, 11-48, 10 speed
Chain	Shimano LG500, 9/10/11 speed
Chainring	FSA, 36T, steel
Brake	Tektro Gemini SL 4 piston hydraulic brake // Tektro Gemini SL 4 piston hydraulic brake
Brake Rotor	Tektro, centerlock, 203mm
Pedal	VP-536 nylon platform
Saddle	Bontrager Verse P3, steel rails
Seatpost	Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 31.6mm, 310mm length
Seat Collar	Bolt-on, 36.4mm
Handlebar	Bontrager Comp, alloy, 31.8mm, 40mm rise, 780mm width
Stem	Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length
Headset	FSA IS-2, 1-1/8'' top, 1.5'' bottom
Grips	Bontrager XR Trail Comp, nylon lock-on
Battery	Bosch PowerTube 600Wh, smart system
Motor	Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)
Charger	Bosch standard 2A, 110V, smart system

Geometry Chart

B B Drop	3
B B Height	33
Chainstay Length	45.8
Eff Seat Tube Angle	77.0°
Eff Top Tube	56.3
Frame Reach	42.5
Frame Size Letter	S
Frame Size Number	15.5"
Frame Stack	59.7
Head Angle	65.0°
Head Tube Length	13
Offset	4.4
Seat Tube	38
Seat Tube Angle	71.1°
Standover	75.6
Trail	12.3
Wheelbase	120.1
Wheel Size	27.5"