Approved Used Trek Powerfly 4 2021 Size X/Small
Approved Used Trek Powerfly 4 2021 Size X/Small
Approved Used Trek Powerfly 4 2021 Size X/Small
Approved Used Trek Powerfly 4 2021 Size X/Small
Approved Used Trek Powerfly 4 2021 Size X/Small

Approved Used Trek Powerfly 4 2021 Size X/Small

  • Built & checked by our Trek-trained workshop
  • Ready-to-ride delivery or free in-store collection
  • UK warranty support from a real local bike shop
  • Expert advice before & after purchase — no call centres
Regular price £3,550.00 Sale price£2,499.00 Save 30%
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Trek Powerfly Buyer Guide

Compare Powerfly +4, +6 and FS+ 4 — and choose the right setup for your riding. Read the guide

Written by our Trek-trained workshop team • UK-spec advice

Found a better deal? Click here for our Price Match Promise.

View our shipping information Here.

Not sure what Motor suits your E-Bike needs? Click Here to see our in-depth, yet easy to understand guide to help you figure out which motor is the best for you!

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Approved Used Details

MakeTrek
ModelPowerfly 4
SizeXS
Year2021
Mileage522 miles
Approved Used Grade B – Very Good
What does this mean?
Accessories Included
  • Bottle cage.
Upgrades
  • Schwalbe Smart Sam Tyres.
Service Work Carried Out See Inspection Report
Original RRP£3,550
Approved Used Grade — what it means

A — Excellent: Minimal cosmetic marks. Fully checked, serviced and ready to ride.

B — Very Good: Normal signs of use. Mechanically spot-on after inspection.

C — Good: Visible cosmetic wear, but fully serviced and Approved Used.

All grades: Known history • workshop-checked • warranty-backed.

Inspection report
Overall Approved Used Grade
B - Great
Frame condition
Minor cosmetic marks
Drivetrain condition
Good
Chain wear checked
Yes
Wheels true
Yes
Tyre condition
Good
Brake performance
Good
Bearing condition
Good
Suspension serviced
No
Motor diagnostic passed
Yes
Battery health
Excellent
Service work carried out
Fully serviced.
Parts replaced: Gear Cable.
Inspected by
Jono
Inspection date
22 January 2026

Approved Used Promise

Known history · Fully checked · 3-month / 1,000-mile warranty

Why Approved Used beats private sales →

This Approved Used Trek Powerfly 4 is a versatile electric mountain bike designed to bring confidence and capability to off-road rides and adventurous trails. Built around Trek’s rugged Alpha Platinum aluminium hardtail frame and smooth pedal-assist system, it delivers reliable motor support to help you tackle climbs and explore forest tracks, farm roads and mixed terrain with ease.

Thoughtfully chosen components and rugged ride dynamics make the Powerfly 4 a dependable choice for riders seeking an approachable, trail-ready e-MTB that balances performance and everyday usability. As an All Ride Now Approved Used bike, this Trek has been fully workshop-checked and prepared before listing, giving you reassurance, known condition and a ready-to-ride setup that private sales can’t match.

Specification Detail
Frame Alpha Platinum Aluminium, curved top tube, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle
Rear Shock N/A
Fork SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 80 mm travel
Headset FSA
Stem
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length
Handlebar Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
Grip Bontrager XR Endurance Comp
Brake Rotors Tektro, 6-bolt, 203 mm
Brake Lever Tektro HD-M275
Front Brake Tektro HD-M275 hydraulic disc
Rear Brake Tektro HD-M275 hydraulic disc
Front Tyre Schwalbe Nobby Nic 27.5x2.6
Rear Tyre Schwalbe Nobby Nic 27.5x2.6
Wheel Size 27.5"
Rim Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve
Spokes Black stainless
Front Hub Formula DC-511, 6-bolt, Boost110, 15 mm thru axle
Rear Hub Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle
Speeds 10
Rear Derailleur Shimano Deore M5120, long cage
Shift Levers Shimano Deore M4100, 10 speed
Chain KMC X10, 10-speed
Cassette Shimano Deore M4100, 11-46, 10-speed
Chainset FSA Bosch CK-220, 36T ring, 165 mm length
Bottom Bracket N/A
Pedals VP-536 nylon platform
Saddle Bontrager Commuter Comp
Seat Post Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Motor Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h max assist
Battery Bosch PowerTube 500 Wh
eBike Display Bosch Purion

Personalised Bike Consultation

Not sure which model is perfect for you? Our expert team at All Ride Now in Midhurst, West Sussex is here to help you choose with confidence.

  • Will you be riding mainly on or off-road?
  • Do you prefer an upright or sportier riding position?
  • Are you looking for longer range, lighter weight, or a more comfortable feel?

Through a friendly consultation – in-store, by phone, live chat or email – we’ll help you narrow down your options and find the bike that best fits your needs.


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