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Aluminium full-suspension electric mountain bike Trek Powerfly+ FS 4 800 Wh CUES lithium/trek black 10-speed

Aluminium full-suspension electric mountain bike Trek Powerfly+ FS 4 800 Wh grey: Bosch CX 800 Wh, 25.50 kg

zł16,737.18 Incl. Tax

~~zł18,450.90~~ MSRP

Recommended supplier selling price in 2026

Color

Gris (clair)/Noir

Size

Size charts

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Description
Product Details

Trek Powerfly+ FS 4 800 Wh Lithium: a big battery from the entry level up

The Trek Powerfly+ FS 4 800 Wh takes the Powerfly+ FS 4 platform, a full-suspension Alpha Platinum aluminium bike with a Bosch Performance Line CX motor, and adds an 800 Wh PowerTube battery. 130 mm of travel up front, 120 mm at the rear and a 10-speed Shimano CUES drivetrain: it weighs 25.50 kg in size M according to Trek. The Lithium/Trek Black colourway pairs a light silvery grey with a deep black.

Technical specifications

Frame	Alpha Platinum aluminium, removable integrated RIB 2.0 battery, Motor Armor protection, Mino Link adjustable geometry, adjustable suspension leverage, ABP, UDH hanger, Boost148, rack and mudguard mounts
Motor	Bosch Performance Line CX, 250 W rated, assist up to 25 km/h (European version)
Battery	Bosch PowerTube 800 Wh, smart system
Suspension	RockShox Recon Silver Solo Air 130 mm with lockout / RockShox Deluxe Select 210x50 mm, 120 mm
Drivetrain	Shimano CUES U6000 GS 1x10, 36T chainring, LinkGlide LG300 11-48 cassette
Brakes	Tektro HD-M5140 hydraulic, Tektro 203 mm rotors
Wheels / tyres	Shimano TC500 hubs, Bontrager Kovee 23 mm rims / Bontrager Gunnison Elite XR 2.40 Tubeless Ready
Cockpit	Bontrager Comp 780 mm handlebar, 40 mm rise, Bontrager Comp 50 mm stem, Trek Line Comp grips
Saddle / seatpost	Bontrager Verse P3 / TranzX JD-YSI34, 100 mm (S), 150 mm (M), 170 mm (L, XL)
Weight	25.50 kg in size M (Trek figure)

At a glance

✓ Bosch CX and PowerTube 800 Wh	✓ RIB 2.0 alloy frame and Motor Armor
✓ 120 / 130 mm travel	✓ 10-speed CUES LinkGlide drivetrain
✓ 203 mm rotors	✓ 25.50 kg in size M

Who is it for?

For the mountain biker who is new to e-MTBs but already knows they will want to ride big loops, or who lives a long way from the trails and has to ride a while to reach them. Also ideal if you like using the strongest assist mode without worrying about range.

The LVR workshop view

A down tube built for 800 Wh. This frame was designed to house a large battery in the down tube without sacrificing stiffness: the 800 Wh PowerTube slides in via the RIB 2.0 system and comes out in one movement for charging. A 34.9 mm seat tube, internal cable routing and Motor Armor protection complete a package designed to last for several seasons.

	Alpha Platinum (Powerfly+ FS)	Alpha NEXT Platinum (Fuel+ EX 8)	OCLV Mountain (Rail+ 9.7 / 9.8)
Level	e-MTB aluminium, built for robustness first	Lighter aluminium from the Fuel+ range	Trek mountain bike carbon
Construction	Down tube sized for 800 Wh	Less material, smaller battery	Carbon main frame, same 800 Wh battery
Reference bike	Powerfly+ FS 4 800 Wh, 25.50 kg (M)	Fuel+ EX 8 (TQ 580 Wh)	Rail+ 9.7, 23.73 kg (M)
What it means	Big battery, a frame that takes the knocks	Lighter bike, less range	Lighter, different budget

Put simply: this FS 4 800 Wh follows the FS 4 recipe with an extra 200 Wh of range for just 220 g more (25.50 kg vs 25.28 kg in M). It is the best-value upgrade in the range when your rides get longer.

An 800 Wh battery lets you ride more often in the high assist modes, the ones that make steep climbs genuinely easy. It comes out via the RIB 2.0 system, with an integrated handle, so you can charge it at home. To look after it, avoid leaving it full or empty for several weeks, and store it away from the summer heat.

The TranzX dropper post, 150 mm in M and 170 mm in L and XL, drops the saddle with a press of the thumb before a descent. The assist, limited to 25 km/h like every 250 W nominal European e-bike, can be updated with the Bosch eBike Flow app or in the workshop.

Which Powerfly+ FS should you choose?

Model	Motor / battery	Rear / front travel	Drivetrain	Weight (M)
Powerfly+ FS 4	Bosch CX / 600 Wh	120 / 130 mm	Shimano CUES 10-speed	25.28 kg
Powerfly+ FS 4 800 Wh	Bosch CX / 800 Wh	120 / 130 mm	Shimano CUES 10-speed	25.50 kg
Powerfly+ 4 800 Wh (hardtail)	Bosch CX / 800 Wh	– / fork only	Shimano CUES 10-speed	24.90 kg
Powerfly+ FS 5	Bosch CX / 800 Wh	120 / 160 mm	Shimano Deore/XT 12-speed	24.58 kg

Our take: 200 Wh more than the FS 4 for an extra 220 g (25.50 vs 25.28 kg in M). The Powerfly+ 4 800 Wh hardtail weighs 600 g less (24.90 kg), but you lose the rear suspension.

LVR sizing advice

The TranzX dropper post grows with the frame: 100 mm in S, 150 mm in M, 170 mm in L and XL. Between two sizes, the smaller one leaves more standover clearance, which is handy when you have to step off the bike on a tricky section.

Size	S	M	L	XL
Rider height (cm)	155-165	165-177	177-188	188-195
Inseam (cm)	74-78	79-83	84-89	89-91
Dropper post (mm)	100	150	170	170
Wheels (in)	27.5	29	29	29

Source: Trek size guide. Bike fitting available in our Béziers shop.

Your questions

Is 800 Wh useful for a beginner?	Yes, if your rides are long or you often ride in a high assist mode.
How long does it take to charge?	It depends on the Bosch charger used; we will give you the details when you collect the bike.
Is the battery heavy to carry?	It comes out using its integrated handle and is easy to carry in one hand.
Is the lithium grey understated?	Yes, it is a light silvery grey with black, sober and easy to keep clean.

The LVR Cycles verdict

The entry-level Powerfly+ FS that does not count the miles, thanks to a big battery for almost the same weight. The lithium grey and black looks sober and modern.

Pros
+ 800 Wh battery for just 220 g more
+ TranzX dropper sized for each frame
+ Understated silver grey

Cons
- 23 mm Kovee rims, narrower than the Line 30
- 10-speed drivetrain

Why buy from LVR Cycles? As a Trek dealer in Béziers, we explain how to look after the 800 Wh battery, set up the RockShox suspension and handle Bosch updates for your Powerfly+ FS 4.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.

Reference TRK-5349576

Data sheet