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The Powerfly FS+ 4 800Wh is a rugged, full-power electric mountain bike built to handle tough alpine terrain and long-distance trail rides.
The Powerfly FS+ 4 800Wh is a rugged, full-power electric mountain bike built to handle tough alpine terrain and long-distance trail rides.
Trek

TREK Powerfly+ 4 Gen 5 800Wh Electric Mountain Bike in Gloss Dark Star and Matte Dark Web

£2,835.00 £3,150.00 10% off
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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.

Online Returns Policy

If you are not happy with any items purchased via our website, under Consumer Contracts Regulations you have the right to return any unused products for a refund within 30 days.

When the customer sends an item back to the company (or, when the company arranges for collecting from the customer), the company will process the returned item then notify the customer via email of the refund. The refund will be issued within 3 - 5 working days of the product being received by us, it may then take an additional 3 - 5 working days for the refund to be paid into the customers account.


If you’d like to return an item within the standard 30-day period and it’s in a suitable condition for resale,.

  1. Use Your Own Postage – Arrange your own return shipping back to us.

Please Note: Returns will only be accepted if they arrive back to us in original new condition, with all original packaging and tags still attached.

Please Note:We do not offer exchanges

Return Address:

Team Cycles LTD
Studio 11B
Second Avenue
Team Valley Trading Estate
Gateshead
NE11 0NF

For items returned within the cooling off period...

  • By law, customers have the right to withdraw from the purchase of an item within 14 working days of the date on which the item is delivered.
  • Where you are withdrawing from your purchase within the cooling-off period, and there has been no error on our part, we will refund the cost of the item.
  • The company will not refund the cost of delivery or other services provided to the customer in connection with the purchase.
  • The cost of delivery back to the company is the responsibility of the customer.
  • Where we collect an item from you, we reserve the right to recover the costs of collection from you.
TERMS AND CONDITIONS
  • Returned goods should be unused, in a saleable condition and in their original packaging with all labels still attached. Team Cycles is entitled to refuse the return or deduct from a refund as a result of the product not being in the above condition.
  • We are only able to exchange like for like products. If you require a different item, you will need to opt for a refund and place a new order. All returns must have a completed returns form.
  • We will refund you to your original payment method.
  • Customised items cannot be returned. *
  • Please do not send your purchase back to the manufacturer unless you have been advised to.
  • Team Cycles customers have 30 days from date of delivery to return their orders.
  • Once we have received the returned goods we will refund you, by the method you used to pay for your order. This may take 5-7 working days to appear as cleared funds.

*Faulty customised goods (or goods that have been altered in any way) will need to be returned for inspection as customisation may void your warranty and therefore faults may not be covered.

WARRANTY

All products ordered from Team Cycles come with a full warranty which covers manufacturing faults and defects in workmanship. If you feel that your purchase has developed a fault, please contact our store for an assessment. To do this you will need proof of purchase.

If taking your product in store is not an option then please email our team on [email protected]. Please include photographs of your product (please keep below 20mb), your web order number (or copy of receipt) so we can immediately start to assess the issue.

PLEASE NOTE:

In some cases, the manufacturer/supplier may require to see the item(s) before repair or replacement can take place. If this is the case, we will inform you and arrange how to do this. All used items being returned to us must be cleaned for hygiene purposes.

On receipt of your goods we will carry out a full inspection and contact you within three working days of receipt.

Finance

Team Cycles (North East) Limited acts as a broker and not the lender and offers finance from Secure Trust Bank PLC T/A V12 Retail Finance. Team Cycles (North East) Limited is authorised and regulated by the Financial Conduct Authority, Registration Number 623982. Not all products offered by Secure Trust Bank T/A V12 Retail Finance are regulated by the FCA. Subject to age, status and affordability, minimum spend applies.

TREK Powerfly+ 4 Gen 5 800Wh Electric Mountain Bike in Gloss Dark Star and Matte Dark Web

Season:2026

Brand:Trek

Code:61707BLK

The Powerfly FS+ 4 800Wh is a rugged, full-power electric mountain bike built to handle tough alpine terrain and long-distance trail rides. A powerful Bosch Performance Line CX motor delivers smooth, natural assistance on steep climbs, while the huge 800Wh battery gives you the confidence to take on longer and more demanding adventures.

With trail-ready geometry, 130mm front and 120mm rear RockShox suspension, and a durable Shimano CUES 10-speed drivetrain, the Powerfly FS+ 4 is designed to keep you in control and comfortable, whether you're navigating rocky descents or grinding up switchbacks. Fully equipped with practical accessories including mudguards, lights, rear rack and kickstand, it's ready for everything from singletrack to bikepacking.


Key Features:

  • Bosch Performance Line CX Motor – Delivers up to 85Nm of torque for powerful, natural-feeling pedal assist on the steepest climbs.

  • 800Wh Bosch Battery – Extra-large capacity for maximum range and long days on the trail.

  • RockShox Suspension – 130mm travel up front and 120mm rear for confident handling and comfort on rough terrain.

  • Shimano CUES 10-Speed Drivetrain – Smooth, reliable shifting with a wide gear range for mixed trail conditions.

  • Integrated Accessories – Equipped with lights, mudguards, a rear rack, and kickstand for all-terrain utility and commuting flexibility.

  • Smart Wheel Size – Frame size-specific wheels (29" on larger sizes, 27.5" on smaller sizes) for balanced handling and fit.


Ideal For:

  • Alpine and backcountry eMTB adventures

  • Weekend trail riders and tourers

  • Bikepacking and multi-day off-road trips

  • Riders who want power, comfort, and range without compromising capability

Upgrade It Before It Ships Make your new bike yours from the start. Add pedals, grips, tyres or other key components now and get everything sorted in one go. Better setup. Better ride. No waiting. ADD TO YOUR ORDER
Technical Information

*Please note – spec applies to all sizes unless listed separately

Frameset

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:

  • 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
  • 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

Max compatible fork travel: See service manual


Wheels

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
Max tyre size: Frame: 29x2.50" (S: 27.5x2.50"), Fork: see manufacturer


E-system

Battery: Bosch PowerTube 800 Wh, 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)


Drivetrain

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: 38T


Components

Saddle: Bontrager Commuter Comp
Seatpost:

  • S: Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
  • M: Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
  • 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:

  • S, M, L, XL: Bontrager XR Endurance Comp, lock-on
  • S, M, L, XL: Trek Line Ergonomic Comp, lock-on

Stem: Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
Headset: FSA IS-2, 1-1/8" top, 1.5" bottom


Brakes

Brake Set: Tektro HD-M275 hydraulic disc
Brake rotor: Tektro, CentreLock, 203 mm
Rotor size: Max brake rotor sizes – Frame: 220 mm, min 180 mm, Fork: see fork manufacturer


Accessories

Tool: Bontrager Switch Lever, w/tool


Weight

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 equipment, specifications, models, colours, materials and pricing. Compatible parts may be substituted due to supply chain issues. Bike and frame weights are based on pre-production painted frames at time of publication; weights may vary in final production.

Sizing Information
size-table
SizeRider HeightInseam
S

155 - 165 cm

5'1" - 5'5"

74 - 78 cm

29" - 31"

M

165 - 176 cm

5'5" - 5'9"

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"

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