Trek Powerfly FS 4 2025 Electric Mountain Bike

The Powerfly FS+ 4 is a full-power full suspension electric mountain bike for taking on alpine adventures. Its Alpha Platinum Aluminium frame pairs with a RockShox Deluxe suspension package (120 mm rear, 120 mm 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.

Features

• The Powerfly FS+ gives you the powerful boost you crave on high alpine climbs, confident comfort on descents and a big battery for getting far out there


• Bosch's Performance Line CX motor delivers plenty of torque for steep, punchy climbs and is easy to control with the Purion 200 remote – plus you can customise it in the eBike Flow app


• Its RIB 2.0 removable integrated battery is easy to remove for travel and storage, and its virtually rattle-free while you ride


• Want even more boost? With the Bosch e-Bike Flow app, you can increase torque to 100 Nm and peak power up to 750W.


• It's compatible with Bosch PowerMore booster batteries, and you can even upgrade the 600 Wh battery for a bigger 800 Wh option to get way out there. Both parts can be retrofitted by the dealer
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Specifications

Frameset

• Frame: Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered headtube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34.9 mm 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, 42 mm offset, Boost110, 15 mm Maxle Stealth, 130 mm travel

Wheels

• Rims: Bontrager Line TLR 30, Tubeless-Ready, Presta valve


• Tyres: Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40

Drivetrain

• Crankset: FSA Bosch CK-220, 36T ring, 165 mm length


• Shifters: Shimano U6000, 10-speed


• Rear Derailleur: Shimano CUES U6000 GS


• Chain: Shimano LG500, 9/10/11-speed


• Cassette: Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed

Components

• Handlebar: Bontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width


• Stem: Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length


• Grips: Bontrager XR Trail Comp, nylon lock-on


• Brakes: Tektro Gemini SL 4 piston hydraulic brake


• Saddle: Bontrager Verse P3, steel rails


• Seatpost: Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 31.6 mm, 450 mm length

E-System

• Motor: Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)


• Battery: Bosch PowerTube 600 Wh, smart system


• Controller: Bosch Purion 200

Powerfly FS Sizing

Product code: 910517