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Aluminium hardtail electric mountain bike Trek Powerfly+ 4 800 Wh CUES gloss dark star/matte dark web 10-speed

Aluminium hardtail electric mountain bike Trek Powerfly+ 4 800 Wh black S: Bosch CX 800 Wh, 27.5 in, 100 mm fork

CHF2,741.57 Incl. Tax

~~CHF3,253.50~~ MSRP

-15%

Recommended supplier selling price in 2026

Color

Black

Size

Size charts

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Description
Product Details

Trek Powerfly+ 4 800 Wh Dark Star in size S: long range for smaller riders

Available in size S, for riders from 155 to 165 cm, this Trek Powerfly+ 4 800 Wh Gen 5 combines a Bosch Performance Line CX motor with an 800 Wh PowerTube battery, 27.5 inch wheels and a 100 mm SR Suntour XCR 34 fork. Trek has not disclosed the weight for this version; for reference, the Powerfly+ 4 800 Wh with an XCM fork, same frame and same battery, weighs 24.90 kg in size M. Gloss Dark Star/Matte Dark Web pairs a gloss black with a matt black.

Technical specifications

Frame	Alpha Platinum aluminium, removable integrated RIB 2.0 battery, Motor Armor motor protection, Control Freak internal routing, tapered head tube, Boost148 12 mm axle
Motor	Bosch Performance Line CX, Bosch smart system; assist cuts out at 25 km/h in Europe
Battery	Bosch PowerTube 800 Wh, integrated in the down tube and removable
Controls / display	Bosch Purion 200 on the bar
Fork	SR Suntour XCR 34, air spring, 2CR damper, hydraulic lockout, Boost110 15 mm axle, 100 mm (size S)
Drivetrain	Shimano CUES 1x10 Linkglide: U6000 GS derailleur, FSA Bosch 36T 165 mm chainset, LG300 11-48 cassette, LG500 chain
Brakes	Disc, Tektro Centerlock 203 mm rotors
Wheels / tyres	Bontrager Connection rims, Shimano TC500 hubs / Bontrager Montrose Comp 27.5 x 2.40 in
Cockpit	Bontrager Comp alloy 780 mm handlebar, 40 mm rise, Bontrager Comp 50 mm stem, Blendr compatible
Saddle / seatpost	Bontrager Commuter Comp / Bontrager alloy 330 mm seatpost
Weight	Weight not disclosed by Trek for this version; for reference: Powerfly+ 4 800 Wh with XCM fork (same alloy frame, same 800 Wh battery), 24.90 kg in size M

At a glance

✓ Bosch CX and PowerTube 800 Wh	✓ Size S, 27.5 inch wheels
✓ SR Suntour XCR 34 fork, 100 mm	✓ 10-speed Shimano CUES
✓ Bosch Purion 200 controller	✓ Weight not published (reference 24.90 kg)

Who is it for?

For the shorter rider who wants the biggest battery in the range without moving beyond a simple bike. It will suit anyone who goes on long rides along tracks and country lanes and doesn't want to keep an eye on the gauge.

The LVR workshop view

Alpha Platinum aluminium, for smaller riders too. Designing a size S frame that houses an 800 Wh battery is no easy task: the down tube has to stay long enough and the standover height low enough. The Alpha Platinum frame of the 5th-generation Powerfly+ manages it, with the same removable battery and the same motor protection as the larger sizes.

	Alpha Platinum (Powerfly+)	Alpha Gold (Marlin+)	OCLV Mountain carbon (Rail+ 9.7 / 9.8)
Level	High-end Trek aluminium	Aluminium of the lightweight e-MTB	Trek mountain bike carbon
Construction	Same frame from S to XL	More compact 400 Wh battery	Impact-resistant OCLV lay-up
Reference bike	Powerfly+ 4 800 Wh, size S	Marlin+ 8, 21.89 kg (M)	Rail+ 9.7 / 9.8
What it means	800 Wh even in a small size	Less energy in reserve	Full suspension, different build

Put simply: this Powerfly+ 4 800 Wh in size S combines the big battery, the 100 mm XCR fork and 27.5 inch wheels. Trek doesn't disclose its weight; the XCM fork version, with the same frame and battery, weighs 24.90 kg in M.

The 27.5 inch wheels and 100 mm fork keep the bike low, which helps you put a foot down and manoeuvre when stationary, an important point on an e-MTB with a big battery. The 2.40 inch Bontrager Montrose Comp tyres keep enough volume to cushion the stones.

The Bosch CX motor meters its help according to your effort; in Europe, it switches off at 25 km/h, for a rated power of 250 W. The removable RIB 2.0 battery charges off the bike and comes out easily thanks to its secondary retainer: ideal if you keep the bike in the garage and charge at home.

Which Powerfly+ should you choose?

Model	Motor / battery	Suspension (M)	Drivetrain	Weight (M)
Powerfly+ 4	Bosch CX / 600 Wh	120 mm fork (100 in S)	Shimano CUES 10-speed	23.10 kg
Powerfly+ 4 800 Wh (XCR fork, size S)	Bosch CX / 800 Wh	100 mm fork (S)	Shimano CUES 10-speed	not disclosed
Powerfly+ 4 800 Wh (XCM fork)	Bosch CX / 800 Wh	120 mm fork	Shimano CUES 10-speed	24.90 kg
Powerfly+ 6 (Line Dropper post)	Bosch CX / 800 Wh	120 mm fork (100 in S)	Shimano XT / Deore 12-speed	24.40 kg

Our take: this Powerfly+ 4 800 Wh in size S differs from the XCM fork version in its 100 mm XCR fork. The 600 Wh Powerfly+ 4 (23.10 kg in M) remains lighter; the Powerfly+ 6 adds a dropper post.

LVR sizing advice

This colourway is only available in size S, designed by Trek for riders from 155 to 165 cm with an inseam of 74 to 78 cm. The 27.5 inch wheels and 100 mm fork lower the bike: handy for putting a foot down and manoeuvring an e-MTB of this size.

Size	S
Rider height (cm)	155-165
Inseam (cm)	74-78
Fork (mm)	100
Wheels (in)	27.5
Seatpost (mm)	330

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

Your questions

What rider height is it for?	155 to 165 cm with a 74 to 78 cm inseam according to Trek.
Why is no weight quoted?	Trek hasn't published it; the XCM version, with the same frame and battery, weighs 24.90 kg in M.
Is the battery heavy to remove?	It comes out one-handed, held by the RIB 2.0 system.
Is the black fully matt?	No, it combines a gloss black and a matt black.

The LVR Cycles verdict

The big 800 Wh battery in a Powerfly+ 4 sized for smaller riders, simple and tough. Its double black, gloss and matt, stays understated.

Pros
+ 800 Wh in size S
+ Agile 27.5 inch wheels
+ Removable RIB 2.0 battery

Cons
- Size S only
- Weight not published by Trek

Why buy from LVR Cycles? In Béziers, we set up your XCR fork, adjust the saddle height to your inseam and handle Bosch system updates.

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-5342362

Data sheet