Trek 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.

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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: 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, 210x50 mm

### Wheels

* Rims: Bontrager Line Comp 30, Tubeless Ready
* Tyres: Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40

### 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

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## Trek Powerfly Sizing

| | S | M | L | XL |
| ----- | ----- | ----- | ----- |
| Rider Height (cm) | 155 - 165 | 165 - 176 | 177 - 188 | 188 - 195 |
| Inseam (cm) | 74 - 78 | 79 - 83 | 84 - 89 | 89 - 91 |