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Adventure-ready electric mountain bike for all terrains.
Adventure-ready electric mountain bike for all terrains.
Trek

2025 Trek Powerfly+ 4 27.5 Electric Mountain Bike Dark Star Dark Web

£3,050.00
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

Hassle free returns

RETURNS POLICY

If you'd like to exchange or return your order please include your name and order number with the return, our returns address is:

Returns
Activ Cycles
Unit 1&2 Kingfisher Business Park
Henwood
Ashford
TN24 8DG

Subject to the terms set out below we are happy to offer a refund or exchange on all goods except goods which are special orders or nutrition products, or where we have expressly advised you that there is no right to return the goods ordered (save in the event the goods are faulty) provided the goods are returned to us within 14 days of delivery to you.

If you return goods to us and request a different size or alternative product we will send it out free of charge (subject to stock availability). If you require a refund (or the replacement item is not in stock) we aim to process refunds within 2 working days of receipt of the goods. It is your responsibility to ensure that the item is returned to us safely and securely and in saleable condition.

Refunds will be processed using the same method of payment used for the original purchase. Due to the high incidence of fraud, we regret that we are unable to offer any refund without a valid receipt/delivery note.

If the product is faulty or wrong due to a mistake on our part then we will send out replacements free of charge and supply you with a prepaid returns label. For all goods returned please include a letter giving details along with a copy of the original receipt. Returned goods must be unused and with all appropriate packaging and labelling intact.

Your rights to return goods are protected under the Consumer Protection (Distance Selling) Regulations 2000 which can be found at theConsumer Protection (Distance Selling) Regulations 2000 (legislation.gov.uk).

2025 Trek Powerfly+ 4 27.5 Electric Mountain Bike Dark Star Dark Web

Season:2025

Brand:Trek

Code:48619BLK

Adventure-ready electric mountain bike for all terrains.

The Powerfly+ 4 is an adventure-ready electric mountain bike that doesn't break the bank. It's designed for exploring anywhere from rugged commutes to light singletrack with a rugged aluminium frame, bump-smoothing suspension fork, and a powerful Bosch Performance Line CX motor that boosts you up and over steep climbs.

An Alpha Platinum Aluminium hardtail frame with an air-sprung SR Suntour suspension fork ensures durability and comfort. The bike features a powerful Bosch Performance Line CX motor (85 Nm, 250 W), with a 600 Wh Powertube RIB 2.0 removable integrated battery and Purion 200 controller. It also includes a durable Shimano Cues 10-speed drivetrain and Tektro hydraulic disc brakes for reliable stopping power.

The Powerfly+ delivers a full-assist ride that's as versatile as it is powerful. Bosch's Performance Line CX motor provides plenty of torque for steep climbs and is easy to control with the Purion 200 remote. The RIB 2.0 removable integrated battery is easy to remove for travel and storage, and it's virtually rattle-free while you ride.

Features:

  • Full-assist ride with versatile power.
  • Bosch Performance Line CX motor with 85 Nm torque.
  • RIB 2.0 removable integrated battery for easy travel.
  • Compatible with Bosch Powermore booster batteries.
  • Mounts for lights, mudguards, rear rack, and kickstand.
  • Bosch eBike Flow app for customization and tracking.
Technical Information
  • Frame Size: XS, S
    Alpha Platinum Aluminium, curved top tube, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle
  • Frame Size: M, L, XL
    Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle
  • Fork Size: XS
    SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 80 mm travel
  • Fork Size: S, M, L, XL
    SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 120 mm travel
  • Max Compatible Fork Travel
    120mm (526mm axle-to-crown), XS: 80mm (492mm axle-to-crown)
  • Hub Front
    Formula DC-511, 6-bolt, Boost110, 15 mm thru axle
  • Hub Rear
    Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle
  • Skewer Rear
    Bontrager Switch thru-axle, removable lever
  • Rim
    Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve
  • Spokes
    14 g stainless steel, black
  • Tyre Size: XS, S
    Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35"
  • Tyre Size: M, L, XL
    Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30"
  • Max Tyre Size
    Frame: 29x2.60" or 27.5x2.80" (XS & S: 27.5x2.60"), Fork: See manufacturer
  • Battery
    Bosch PowerTube 625Wh, smart system
  • Charger
    Bosch standard 2A, 230V, smart system
  • Controller
    Bosch Intuvia 100, smart system
  • Computer
    Bosch LED remote, smart system
  • Motor
    Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm
  • Shifter
    Shimano Deore M4100, 10 speed
  • Rear Derailleur
    Shimano Deore M5120, long cage
  • Crank
    FSA Bosch CK-220, 36T ring, 165 mm length
  • Chainring
    FSA, 36T, steel
  • Cassette
    Shimano Deore M4100, 11-46, 10-speed
  • Chain
    KMC X10, 10-speed
  • Pedal
    VP-536 nylon platform
  • Max. Chainring Size
    1x: 38T
  • Saddle
    Bontrager Commuter Comp
  • Seatpost Size: XS, S
    Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
  • Seatpost Size: M
    Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
  • Seatpost Size: L, XL
    Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
  • Handlebar Size: XS, S
    Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
  • Handlebar Size: M, L, XL
    Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
  • Grips
    Bontrager XR Endurance Comp, lock-on
  • Stem Size: XS
    Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
  • Stem Size: S, M
    Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 60 mm length
  • Stem Size: L, XL
    Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length
  • Head Set
    FSA IS-2, 1-1/8" top, 1.5" bottom
  • Brake Rotor
    Tektro, 6-bolt, 203 mm
  • Brake Set
    Tektro HD-M275 hydraulic disc
  • Rotor Size
    Max brake rotor sizes - Frame: 203mm, Fork: see fork manufacturer
  • Weight
    M - 24.53 kg / 54.08 lbs
  • Weight Limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb)
Sizing Information
Professional Opinion
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