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Powerfly+ 4 800 Wh is an adventure-ready electric mountain bike that doesn’t break the bank. Its rugged aluminium frame gives you a powerful boost thanks to a Bosch Performance Line CX motor with a massive 800 Wh battery. A bump-smoothing SR Suntour suspension fork boosts confidence on any trail while 10-speed Shimano CUES gives you clean shifting.

Powerfly+ 4 800 Wh is an adventure-ready electric mountain bike that doesn’t break the bank. Its rugged aluminium frame gives you a powerful boost thanks to a Bosch Performance Line CX motor with a massive 800 Wh battery. A bump-smoothing SR Suntour suspension fork boosts confidence on any trail while 10-speed Shimano CUES gives you clean shifting.

Trek

Trek Powerfly+ 4 800 Wh Gen 5 Dark Star

£3,150.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

No Quibble Returns

Online/ Mail Order Returns:
  • If for any reason you are not satisfied, you can return any item ordered via mail order provided that the goods are complete with all relevant packaging in an unused and re-saleable condition within 14 days of the date of shipment for a refund or an exchange. It's that simple.
  • We make no charge for returns - there is no restocking fee
  • Returned goods must be unused, in a saleable condition and in their original packaging with all labels still attached. Please note that items showing signs of wear or those that have been engraved, altered, resized, or damaged in any way cannot be accepted for return.
  • We cannot accept returns on clothing that has been personalised e.g. with name printing
  • We will credit the card we have on file for you this may take up to 10 working days to appear as cleared funds
  • If the original payment was via PayPal we will credit the PayPal account that the order was placed with
  • Value of goods only will be refunded.
  • For the purpose of hygiene, shorts, knicks and tights with a seatpad cannot be returned

NOTE: Please do not tape up, or attach labels direct to the retail packaging, please wrap the product first.

  • Goods must be returned within 14 days of receipt.
  • Goods must be in original packaging.
  • Goods must not be fitted or used.
  • Goods must be accompanied with a copy of your Original Receipt and aCover note with your name, address, reason for return, explaining if you would like a exchange or refund

If you return something due to it not fitting or being suitable, you will need to pay the postage costs to return it to us.

If you return something due to it being faulty we refund up to £10 carriage for bikes & frames and £5 for smaller items. If your return exceeds this amount please contact us and we can arrange collection for you. Please state a date and collection address (not Saturday or Sunday) where the goods can be collected from.

We recommend you use recorded delivery or registered post to return items so as to cover yourself against loss.

Customers outside of the UK must follow the instructions belowalong with our standard returns procedure.

To help us deal with your return to us quickly and efficiently you must mark all returns as RETURNED GOODS – FAILED SALE. This must be clearly marked on the customs information document ( CN22 and/ or CN 23) on the outside of the packaging. Failure to do so may result in the goods being refused at customs in the UK and so being returned to the sender.

If you have paid import duty for goods received, and subsequently return the goods to us, it should be possible for you to claim a refund of duties from your local Customs Authority. To do this, you will need to show them proof of duty paid and proof of export (e.g. certificate of posting) when claiming your refund.

Should you have any further queries on duties payable/refundable, please contact your local Customs Authority.

Damaged Goods

Before you sign for your goods make sure you are satisfied the contents are not damaged.

If in any doubt write: "GOODS DAMAGED"

IMPORTANT: If you sign that the item as 'has been received in good condition' you will have no claim later if the product is found to be damaged.

Damaged goods must be reported within 24 hours of receipt.

Warranty & Warranty Returns

We never want an item to fail but we recognise that failures can happen. When you buy wih Pedal Revolution you can have total piece of mind and know that we will give you issue our full attention. Our team work with suppliers and brands to ensure any warranty case is handled with the upmost care and is processed as quickly as possible.

Warranty items need to be returned to us at the below address with the package clearly marked as "Warranty" so that we can send them to the supplier to start the warranty procedure - warranty cases are handled by the brand or supplier of the goods and normally have a 1-3 week turn around.

Warranty items must be returned with a copy of your original receipt (the is a requirement of the brands/ suppliers).

No monies can be refunded until an item is accepted for warranty by the brand/ supplier

Returns Address

Returns Dept
Pedal Revolution
63-67 Bethel Street
Norwich
Norfolk
NR2 1NR

Trek Powerfly+ 4 800 Wh Gen 5 Dark Star

Season:2026

Brand:Trek

Code:61707BLK

Great power. Even greater adventure

From high alpine dreams to everyday escapes, the Powerfly+ is your ticket to epic adventures. With a powerful yet quiet Bosch motor and a massive 800 Wh battery for all-day rides, lung-busting climbs turn into a breeze. Mounts for bags and racks make loading up and customising your ride simple, and a front suspension fork gives you plenty of traction and confidence on rough trails.

Powerfly+ 4 800 Wh is an adventure-ready electric mountain bike that doesn’t break the bank. Its rugged aluminium frame gives you a powerful boost thanks to a Bosch Performance Line CX motor with a massive 800 Wh battery. A bump-smoothing SR Suntour suspension fork boosts confidence on any trail while 10-speed Shimano CUES gives you clean shifting.

New RIB 2.0

New RIB 2.0

Removable Integrated Battery (RIB 2.0) makes it easy to remove your battery for more convenient charging or travelling, and you don’t have to worry about dropping it thanks to a secondary safety catch.

Extend your ride

Extend your ride

Wanna take your ride even further? Pair a 250Wh PowerMore range extender with your bike to chase your most epic adventures.

Light, quiet, powerful: 100Nm upgrade ready

Light, quiet, powerful: 100Nm upgrade ready

Bosch’s Performance Line CX motor has 85Nm of torque out of the box but can be tuned all the way up to 100Nm and 750W of power using the Bosch eBike Flow app, the all-new Bosch CX motor is lighter, quieter and now more powerful than ever without wavering on natural-feeling support for crushing epic rides.

Massive range for epic rides

Massive range for epic rides

Bosch’s new 800 Wh battery gives you enormous range for chasing down your greatest adventures – or you can swap to a 600 Wh option for a lighter-weight ride with more nimble handling.

Customise your ride

Customise your ride

Get more utility and sleek integration with mudguards and a rack designed specifically for Powerfly, so you can customise your setup for everyday needs or epic exploration.

Bosch eBike Flow app

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalised experience. Use it to customise your motor's assist behaviour, track your ride stats and integrate your data with apps like Strava and Apple Health. There's even handy features like navigation and service reminders.

Shimano CUES

Shimano CUES

Inspired by rider demand for trouble-free drivetrain longevity and performance, Shimano CUES offers a new foundation for versatility and durability across a range of both electric and standard bikes. CUES features Shimano’s new LINKGLIDE drivetrain technology for significantly increased life on wear items like chain, cassette and chainrings.

Shimano LINKGLIDE

LINKGLIDE technology has been specifically engineered for incredible durability while still delivering smooth and decisive shifting – along with a great pedalling experience. Available exclusively on Shimano CUES drivetrains.

Technical Information
Frame - Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered head tube, guided internal routing, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle

*Fork

Size: S
SR Suntour XCR 34, air spring, 2CR damper, hydraulic lockout, tapered steerer, 44 mm offset, Boost 110, 15 mm bolt-on thru axle, 100 mm travel
Size: M , L , XL
SR Suntour XCR 34, air spring, 2CR damper, hydraulic lockout, tapered steerer, 44 mm offset, Boost 110, 15 mm bolt-on thru axle, 120 mm travel
Hub front
Shimano TC500 alloy, CentreLock, 110x15 mm thru axle

Hub rear
Shimano TC500 alloy, CentreLock, 148x12 mm thru axle

Skewer rear
Bontrager Switch thru axle, removable lever

Rim
Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve

*Tyre
Size: S
Bontrager XT3 Comp, wire bead, 30 tpi, 27.5x2.40"
Size: M , L , XL
Bontrager XT3 Comp, wire bead, 30 tpi, 29x2.40"

Max tyre size
See service manual
Battery
Bosch PowerTube 600 Wh, smart system

Charger
Bosch standard 2A, 230V, smart system

Computer
Bosch Purion 200

Motor
Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC)
Shifter
Shimano U6000, 10-speed

Rear derailleur
Shimano CUES U6000 GS

Crank
FSA Bosch CK-220, 36T ring, 165 mm length

Chainring
FSA, 36T, steel

Cassette
Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed

Chain
Shimano LG500, 9/10/11-speed

Pedal
VP-536 nylon platform

Max. chainring size
1x: 42T
Saddle
Bontrager Commuter Comp

*Seatpost
Size: S
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Size: M
Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
Size: L , XL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length

Handlebar
Bontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width

Grips
Bontrager XR Endurance Comp, lock-on

Stem
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length

Head set
FSA IS-2, 1-1/8" top, 1.5" bottom

Brake rotor
Tektro, CentreLock, 203 mm

Brake Set
Tektro HD-M275 hydraulic disc

Rotor size
Max brake rotor sizes – Frame: 203mm, min 180mm, Fork: see fork manufacturer
Tool
Bontrager Switch Lever, w/tool
Weight
M – 23.10kg/50.93lbs

Weight limit
This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136kg (300lbs).
Sizing Information

How tall are you?

To measure your height, stand up straight, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inside leg?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inside leg measurement. Your inside leg is very important to your final bike size so please measure carefully.

Sizing

size-table
SizeRider HeightInseam
S

155 - 165 cm

5'1" - 5'5"

74 - 78 cm

29" - 31"

M

165 - 177 cm

5'5" - 5'10"

79 - 83 cm

31" - 33"

L

177 - 188 cm

5'10" - 6'2"

84 - 89 cm

33" - 35"

XL

188 - 195 cm

6'2" - 6'5"

89 - 91 cm

35" - 36"

Geometry

All measurements provided in cm unless otherwise stated.

Sizing table
Frame size letterWheel sizeA — Seat tubeB — Seat tube angleEffective seat tube angleC — Head tube lengthD — Head angleE — Effective top tubeF — Bottom bracket heightG — Bottom bracket dropH — Chainstay lengthI — OffsetJ — TrailK — WheelbaseL — StandoverM — Frame reachN — Frame stack
S27.5"37.073.0°75.0°13.365.5°57.131.54.544.24.411.6115.169.741.059.9
M29"40.073.3°75.0°10.866.5°61.231.56.546.14.411.7119.574.744.064.1
L29"42.073.4°75.0°12.366.5°64.031.56.546.14.411.7122.674.646.565.5
XL29"45.074.6°76.0°14.366.5°65.831.56.546.14.411.7125.974.649.067.3
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