Trek Powerfly FS+ 4 Gen 4 2026

Description

The Powerfly FS+ 4 is a full-power full suspension electric mountain bike for taking on alpine adventures. Its Alpha Platinum Aluminium frame pairs with a RockShox Deluxe suspension package (120 mm rear, 130 mm front) to smooth out rough trails, while a 10-speed Shimano CUES drivetrain provides simple, low maintenance shifting. Tektro Gemini SL 4-piston hydraulic disc brakes give you stopping power at a great value.

It’s right for you if…

You’re itching to explore and want a full-power, fully-capable e-MTB to take you there. You want the trail-smoothing benefits of a full-suspension mountain bike for rough roads and light singletrack, but don’t see steep rock gardens or jump trails in your forecast.

The tech you get

An Alpha Platinum Aluminium frame with a Bosch Performance Line CX motor (85 Nm, 250 W), a 600 Wh PowerTube RIB 2.0 removable integrated battery and Purion 200 controller. 130 mm front and 120 mm rear suspension from a RockShox Recon Silver RL fork with Solo Air spring and Motion Control damper and a RockShox Deluxe Select shock. Tubeless-ready wheels with puncture-resistant 2.4 tyres, a 10-speed Shimano CUES drivetrain for clean shifts, a Bontrager Line dropper post and hydraulic disc brakes.

The final word

Explore the beyond with Powerfly FS+ 4. This capable and powerful e-MTB is ready to keep you soaring up the trail with a grin as big as you have on the downs. Its capable full-suspension set-up smooths rough tracks and boosts confidence while you venture to alpine yurts or just around town.

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, 210×50 mm

Wheels

Specifications *Front Hub Size:M , L , S , XL
Shimano TC500 alloy, CentreLock, 110×15 mm thru axle *Rear Hub Size:M , L , S , XL
Shimano TC500 alloy, CentreLock, 148×12 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, 27.5×2.40″ Size:M , L , XL
Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29×2.40″ *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: 29×2.50″ (S: 27.5×2.50″), Fork: see manufacturer

E-system

Specifications *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

Specifications *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

Specifications *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

Specifications *Fender Size:M , L , S , XLTrek 27.5″ custom fender

Weight

Specifications Weight M 24.58 kg/54.19lb (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.