Powerfly FS+ 8 Gen 4 2026 Electric Mountain Bike

The Powerfly FS+ 8 is a deluxe full-power, full suspension electric mountain bike ready for adventure. Its sturdy Alpha Platinum Aluminium frame partners with a Fox suspension fork and shock (120 mm rear, 130 mm front) to smooth out rough trails, while a 12-speed wireless SRAM GX Eagle AXS transmission keeps shifting ultra-smooth through even the roughest terrain. 4-piston SRAM DB 8 hydraulic disc brakes provide stop-on-a-dime control for loose, wet and steep trails.

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

• • Rear Shock: Fox Float Rhythm, 2-position damper, 210×50 mm

Wheels

• • Rims: Bontrager Line Comp 30, Tubeless Ready

• • Tyres: Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29×2.40

Drivetrain

• • Crankset: SRAM GX, 160 mm length

• • Shifters: SRAM AXS POD

• • Rear Derailleur: SRAM GX Eagle AXS, T-Type

• • Chain: SRAM GX Eagle, T-Type, 12-speed

• • Cassette: SRAM Eagle XS-1275, T-Type,10-52, 12-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: SRAM DB 8 4-piston hydraulic disc

• • Saddle: Bontrager Verse P3, steel rails

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

• • Extras: Trek Custom Fender

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 800 Wh, smart system

• • Controller: Bosch LED remote, smart system

Trek Powerfly Sizing

Product code: 931389