The Trek Powerfly FS+ 4 Gen 4 is a comfortable and confidence-inspiring introduction to full-suspension e-mountain biking. It’s designed for riders who want to spend more time off-road while enjoying the added comfort and control that rear suspension brings.
Compared to hardtail models, the FS+ 4 smooths out roots, rocks and uneven trails, helping you ride longer and with more confidence. It’s well suited to bridleways, woodland tracks and light trail centre use.
IT’S RIGHT FOR YOU IF…
You want the benefits of full suspension for recreational off-road riding and mixed terrain. You value comfort, stability and confidence over outright aggression, and want a bike that feels easy to live with on longer rides.
This is a great choice for riders stepping up from a hardtail or riding varied off-road routes where comfort really matters.
THE TECH YOU GET…
An Alpha Platinum Aluminium full-suspension frame paired with the Bosch Performance Line CX motor delivers smooth, predictable assistance across mixed terrain.
A reliable suspension setup improves traction and comfort, while durable drivetrain components and hydraulic disc brakes provide dependable performance on climbs and descents.
THE FINAL WORD…
The Powerfly FS+ 4 is a capable and approachable full-suspension e-MTB that prioritises comfort and confidence. If you’re deciding where it sits in the range, our Powerfly Buyer Guide explains how it compares to other models.
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
RockShox Recon Silver RL, Solo Air, Motion Control damper, lockout, tapered steerer, 42 mm offset, Boost110, 15 mm Maxle Stealth, 130 mm travel
|
| *Shock |
Size: M , L , S , XL
RockShox Deluxe Select R, 210x50 mm
|
Wheels
| *Front Hub |
Size: M , L , S , XL
Shimano TC500 alloy, CentreLock, 110x15 mm thru axle
|
|---|---|
| *Rear Hub |
Size: M , L , S , XL
Shimano TC500 alloy, CentreLock, 148x12 mm thru axle
|
| *Rear Skewer | Size: M , L , S , XLBontrager Switch thru-axle, removable lever |
| *Rim | Size: M , L , S , XLBontrager Line TLR 30, Tubeless-Ready, 28-hole, Presta valve |
| Size: M , L , S , XLBontrager Line TLR 30, Tubeless-Ready, 32-hole, Presta valve | |
| *Spokes |
Size: M , L , S , XL
14 g stainless steel, black
|
| *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 600 Wh, smart system
|
|---|---|
| *Charger |
Size: M , L , S , XL
Bosch standard 2A, 230V, smart system
|
| *Computer |
Size: M , L , S , XL
Bosch Purion 200
|
| *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
Shimano U6000, 10-speed
|
|---|---|
| *Rear Derailleur |
Size: M , L , S , XL
Shimano CUES U6000 GS
|
| *Crank |
Size: M , L , S , XL
FSA Bosch CK-220, 36T ring, 165 mm length
|
| *Chain Ring | Size: M , L , S , XLFSA, 36T, steel |
| *Cassette |
Size: M , L , S , XL
Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed
|
| *Chain |
Size: M , L , S , XL
Shimano LG500, 9/10/11-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
Tektro Gemini SL 4 piston hydraulic brake
|
| *Brake Rotor |
Size: M , L , S , XL
Tektro, CentreLock, 203 mm
|
| 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 – 24.58 kg/54.19 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.
