Trek Powerfly+ FS 6 Gen 4 2025

It's right for you if...

You want to explore without limits and you want a powerful e-bike to take you everywhere. You're looking for full assist to flatten long, punchy climbs and just enough trail-smoothing suspension to deliver confident handling in the rough. You want upgrades where they matter, like the clean, wireless shifts of a SRAM AXS T-Type transmission.

The tech you get

An Alpha Platinum Aluminium frame with a Bosch Performance Line motor CX (85 Nm, 250 W), a huge 800 Wh PowerTube RIB 2.0 removable integrated battery and Purion 200 controller. 130 mm front and 120 mm rear suspension from a FOX Rhythm 36 fork and a FOX Float Rhythm shock. Tubeless-ready wheels with puncture-resistant 2.4˝ tyres, a 12-speed wireless SRAM GX Eagle AXS T-Type transmission for clean shifts, a Bontrager Line dropper post and hydraulic disc brakes.

The final word

The Powerfly FS+ 8 is an electric mountain bike built for discovering what's beyond the next climb. It features just enough trail-smoothing suspension to boost comfort and confidence, and plenty of power to get you wherever you want to explore.

Why you'll love it

• 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
• You can customise the Powerfly for how and where you ride, with mounts for bags, lights and racks
• Want to ride even further? The Powerfly FS+ is compatible with Bosch PowerMore booster batteries, so you can explore from dawn to dusk 

SPECS:

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: Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 130mm travel

Shock: Fox Float Rhythm, 2-position damper, 210x50 mm

Max compatible fork travel: See service manual

WHEELS

• Wheel front
  • Size: S: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"
  • Size: M , L , XL: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29"
• Wheel rear
  • Size: S: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5''
  • Size: M , L , XL: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''
• Skewer rear: Bontrager Switch thru-axle, removable lever
• Tyre
  • Size: S: Bontrager Gunnison Pro XR, Tubeless-Ready, wire bead, 60 tpi, 27.5x2.40"
  • Size: M , L , XL: Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40"
• Tyre part: Bontrager TLR sealant, 180 ml/6 oz
• Rim strip: Bontrager TLR
• Max tyre size: Frame: 29x2.50" (S: 27.5x2.50"), Fork: see manufacturer

E-SYSTEM

• Battery: Bosch PowerTube 800 Wh, smart system
• Charger: Bosch standard 4A, 230V, smart system
• Computer
  • Size: S , M , L , XL: Bosch Kiox 300, smart system
  • Size: S , M , L , XL: Bosch LED remote, smart system
• Motor: Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)

DRIVETRAIN

• Shifter: SRAM AXS POD
• Rear derailleur: SRAM GX Eagle AXS, T-Type
• Crank: SRAM GX, 160 mm length
• Cassette: SRAM Eagle XS-1275, T-Type,10-52, 12-speed
• Chain: SRAM GX Eagle, T-Type, 12-speed
• Pedal: VP-536 nylon platform
• Max. chainring size: 1x: 38T

COMPONENTS

• Saddle: Bontrager Verse P3, steel rails
• Seatpost
  • Size: S: Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 31.6 mm, 310 mm length
  • Size: M , L , XL: Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 31.6 mm, 450 mm length
• Handlebar: Bontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width
• Grips: Bontrager XR Trail Comp, nylon lock-on
• Stem: Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
• Head set: FSA IS-2, 1-1/8" top, 1.5" bottom
• Brake: SRAM DB 8 4-piston hydraulic disc
• Rotor size: Max brake rotor sizes – Frame: 220 mm, min 180 mm, Fork: see fork manufacturer

ACCESSORIES

• Mudguard : Trek 27.5" custom fender

WEIGHT

• Weight: M - 24.48 kg / 53.97 lbs (with TLR sealant, no tubes)
• Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

The manufacturer reserves the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. The prices shown are the manufacturer's suggested retail prices.