The Forge Cycleworks

Trek Powerfly FS+ 4 800Wh Gen 4 2026 - Mercury/Dark Web

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£5,100.00 £4,150.00 GBP

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The Powerfly FS+ 4 800W is a full-power full suspension electric mountain bike for taking on alpine adventures. Its powerful Bosch motor gives you a boost for soaring up climbs, while a massive 800 Wh battery keeps you going through your longest adventures. A RockShox suspension package (120 mm rear, 130 mm front) smooths out rough trails, while a 10-speed Shimano CUES drivetrain delivers clean-shifts for any kind of trail.


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, Solo Air spring, Motion Control damper, lockout, tapered steerer, 42 mm offset, Boost110, Maxle Stealth, mudguard mounts, 130 mm travel
*Shock Size: M , L , S , XL
RockShox Deluxe Select R, 210x50 mm
Specifications
*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 , XL Bontrager Switch thru-axle, removable lever
*Rim Size: M , L , S , XL Bontrager Line TLR 30, Tubeless-Ready, 28-hole, Presta valve
Size: M , L , S , XL Bontrager 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 , XL Bontrager TLR
Max tyre size Frame: 29x2.50" (S: 27.5x2.50"), Fork: see manufacturer
Specifications
*Battery Size: M , L , S , XL
Bosch PowerTube 800 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)
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 , XL FSA, 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 , XL VP-536 nylon platform
Max. chainring size 1x: 38T
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 , XL Bontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width
*Grips Size: M , L , S , XL
Bontrager XR Trail Comp, nylon lock-on
Size: M , L , S , XL Trek Line Comp, nylon lock-on
*Stem Size: M , L , S , XL Bontrager 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
Specifications
*Fender Size: M , L , S , XL Trek 27.5" custom fender
Specifications
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.
SKU:.NPFLY48G426GY
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