The Trek Powerfly FS+ 8 Gen 4 sits at the top of the FS range, delivering premium components for riders who want maximum control, performance and refinement on demanding trails.
With higher-end suspension and drivetrain components, the FS+ 8 stays composed at speed and excels on technical climbs and descents. It’s built for confident riders who want the best trail performance the Powerfly FS platform offers.
IT’S RIGHT FOR YOU IF…
You ride challenging off-road terrain regularly and want top-tier control, precision and confidence. You value performance upgrades that make a real difference on technical trails.
This is a great choice for experienced riders who want a full-suspension e-MTB that feels capable and refined when pushed hard.
THE TECH YOU GET…
A premium Alpha Platinum Aluminium full-suspension frame paired with the Bosch Performance Line CX motor delivers powerful, responsive assistance on demanding terrain.
High-performance suspension components improve control and tracking, while an upgraded drivetrain and strong hydraulic disc brakes ensure confident performance in all conditions.
THE FINAL WORD…
The Powerfly FS+ 8 is the most capable and refined FS model in the lineup. If you want top-level trail performance without going full enduro, our Powerfly Buyer Guide shows how it compares across the range.
Specifications
| *Frame |
Size: M , L , S , XL
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 |
Size: M , L , S , XL
Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 130mm travel
|
| *Shock |
Size: M , L , S , XL
Fox Float Rhythm, 2-position damper, 210x50 mm
|
Wheels
| *Front Wheel | Size: SBontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5" |
|---|---|
| Size: M , L , XLBontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29" | |
| *Rear Wheel |
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''
|
|
| *Rear Skewer | Size: M , L , S , XLBontrager Switch thru-axle, removable lever |
| *Tire |
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"
|
|
| *Tire Part |
Size: M , L , S , XL
Bontrager TLR sealant, 180 ml/6 oz
|
| *Rim Strip | Size: M , L , S , XLBontrager TLR |
| Max tyre size | Frame: 29x2.50" (S: 27.5x2.50"), Fork: see manufacturer |
E-system
| *Battery |
Size: M , L , S , XL
Bosch PowerTube 800 Wh, smart system
|
|---|---|
| *Charger |
Size: M , L , S , XL
Bosch standard 4A, 230V, smart system
|
| *Computer |
Size: M , L , S , XL
Bosch Kiox 300, smart system
|
|
Size: M , L , S , XL
Bosch LED remote, smart system
|
|
| *Motor |
Size: M , L , S , XL
Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)
|
Drivetrain
| *Shifter |
Size: M , L , S , XL
SRAM AXS POD
|
|---|---|
| *Rear Derailleur |
Size: M , L , S , XL
SRAM GX Eagle AXS, T-Type
|
| *Crank |
Size: M , L , S , XL
SRAM GX, 160 mm length
|
| *Chain Ring |
Size: M , L , S , XL
SRAM T-Type, 34T, steel
|
| *Cassette |
Size: M , L , S , XL
SRAM Eagle XS-1275, T-Type,10-52, 12-speed
|
| *Chain |
Size: M , L , S , XL
SRAM GX Eagle, T-Type, 12-speed
|
| *Pedal | Size: M , L , S , XLVP-536 nylon platform |
| Max. chainring size | 1x: 38T |
Components
| *Saddle |
Size: M , L , S , XL
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 | Size: M , L , S , XLBontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width |
| *Grips |
Size: M , L , S , XL
Bontrager XR Trail Comp, nylon lock-on
|
| *Stem | Size: M , L , S , XLBontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length |
| *Headset |
Size: M , L , S , XL
FSA IS-2, 1-1/8" top, 1.5" bottom
|
| *Brake |
Size: M , L , S , XL
SRAM DB 8 4-piston hydraulic disc
|
| Rotor size | Max brake rotor sizes – Frame: 220 mm, min 180 mm, Fork: see fork manufacturer |
Accessories
| *Fender | Size: M , L , S , XLTrek 27.5" custom fender |
|---|
Weight
| Weight | M – 24.48 kg/53.97 lb (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). |
We reserve 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.
Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
Personalised Bike Consultation
Not sure which model is perfect for you? Our expert team at All Ride Now in Midhurst, West Sussex is here to help you choose with confidence.
- Will you be riding mainly on or off-road?
- Do you prefer an upright or sportier riding position?
- Are you looking for longer range, lighter weight, or a more comfortable feel?
Through a friendly consultation – in-store, by phone, live chat or email – we’ll help you narrow down your options and find the bike that best fits your needs.
