2023 Trek Powerfly FS 4 Gen 3 625Wh Electric Mountain Bike

£4,175.00

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The 2023 Trek Powerfly FS 4 is a trail-ready full-suspension electric mountain bike that's eager to roll onto the singletrack. The plush suspension set-up soaks up rough terrain and the powerful Bosch electric drive system boosts your capacity to crush long and punchy climbs and mile after mile of singletrack. The new LED remote and Kiox display pair with the eBike Flow app to give you activity tracking, navigation and Bluetooth connectivity.

A durable aluminium frame with an ultra user-friendly Removable Integrated 625 Wh Battery, a powerful Bosch Performance CX (250 Wh, 85 Nm) motor that helps you sustain speeds of up to 20 mph (25 km/h in Europe) and a smart system LED controller and Kiox display. Plus, an SR Suntour 120 mm suspension fork, 100mm of rear travel, a 10-speed Shimano drive train, powerful hydraulic disc brakes and a dropper post.

This full-suspension e-MTB boosts comfort and capability on the trail with just the right amount of power to get you through long miles and up steep climbs. Its suspension package cushions rough trails so you can comfortably reach new destinations.

- You'll get a ride that keeps you comfortable while you tackle it all thanks to its front and rear suspension package that gobbles up bumps

- The Kiox display gives you ride info, connects with your Bluetooth-enabled devices and has a built-in theft-prevention feature

- The dropper post lets you lower your saddle on the fly so it's out of the way on descents

- The size S frame features a curved top tube that makes standing over the bike easier. Plus, Smart Wheel Sizing means you'll get the fastest wheel that fits ? 29? wheels on larger frames, 27.5? wheels on smaller frames

Electric Bike Updates and Diagnostics

As electric bikes have become more sophisticated it’s important to stay on top of updates. Just like your home computer or smart phone regular updates are now released for most electric bike systems. If you buy a bike from Cycles UK we will do electric bike updates and diagnostics you need free of charge.

Electric Bike Updates

Electric bike updates can help to improve battery life, tweak how the motor works and fix bugs and problems. Most systems will require you to plug your bike into some specialist software at an authorised dealer. At Cycles UK we are authorised dealers for top electric bike brands including Specialized, Trek, Orbea, Whyte, Cannondale and Raleigh. As a result our stores have the software and hardware to run updates on all the major electric bike systems including Bosch, Shimano and Ebikemotion.

Free Electric Bike Updates and Diagnostics

We now provide free updates and diagnostics for life on any electric bike purchased from Cycles UK.

Electric Bike Motors Explained

Electric bikes have really come into their own in the last couple of years. Thanks to advances in electric bike motors and batteries. A couple of bike manufacturers, most notably Specialized, are making their own electric bike motors. The vast majority of bike companies are using the same motors. So, you will find exactly the same electric motor being used on bikes from different brands and at different price points. In this guide, we’ll take you through the main types of electric bike motors. Look at the differences between the most commonly used brands.

Electric Bike Hub Motors vs Mid-Drive Motors

Electric bikes tend to either come with a hub motor or a mid-drive motor. Mid-drive motors sit where the cranks and bottom bracket are on a bike and drive the cranks and chain around. Hub drive motors sit in the middle of the wheel and drive the wheel directly. Hub drive electric bikes are cheaper but less efficient, and less smooth, to ride.


Read our guide to electric bike motors

Trek Electric Bike Range Guide

The Trek electric bike range has been pretty enormous at times. This has mainly been due to a single model of bike being available in multiple battery and colour variations so you quickly ended up with dozens of variants. Thankfully Trek have scaled this back a little recently, and their electric bike range is now easier to understand.

Until recently nearly all Trek electric bikes came with Bosch motors. For the 2023 season they are continuing with Bosch but also introducing motors from new brands like TQ and Hydrive on selected models.

Read our full Trek electric bike range guide

Price Match at Cycles uk

We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.

Trek made their first bikes in 1976 in a barn in Wisconsin. Now they’re one of the biggest bike brands in the world. Trek bikes cover everything from professional-level road and mountain bike race bikes to commuters, hybrids and kids bikes. There is a strong heritage of racing at Trek and many Trek bikes have a strong race influence. They take a very scientific approach to researching bike and human performance and then make the fastest and most efficient bikes they can.

It doesn’t stop their attention and passion for cycling flows through everything they do. Since the 1990s, Trek has supported Places for Bikes. Places for Bikes is an advocacy organisation in the USA that gets more people on bikes more often! Places for Bikes ethos falls in line with the companies mission statement to:

Build only products we love. Provide incredible hospitality to our customers, and change the world by getting more people on bikes.

Frame Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armour, rocker link, rack and mudguard mount, ABP, Boost148, 100 mm travel
*Fork Size: XS , S
SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44 mm offset, oversized crown for eMTB, Boost110, 15 mm bolt-on thru axle, 100 mm travel
Size: M , L , XL
SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44 mm offset, oversized crown for eMTB, Boost110, 15 mm bolt-on thru axle, 120 mm travel
Shock SR Suntour Edge R, 190 mm x 45 mm
Max compatible fork travel 120 mm (XS and S: 520 mm axle-to-crown, M and up: 545 mm axle-to-crown)
Hub front Bontrager sealed bearing, alloy axle, 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 Alex MD35, tubeless compatible, 32-hole, 35 mm width, Presta valve
*Tyre Size: XS , S
Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35"
Size: M , L , XL
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30"
Max tyre size Frame: 29x2.40" (XS and S: 27.5x2.60") Fork: See manufacturer
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 Wellgo VPE-536
Max. chainring size Max: 46T, Min 34T
Saddle Bontrager Arvada, steel rails, 138 mm width
*Seatpost Size: XS , S , M
TranzX JD-YSP18, 100 mm travel, internal routing, 31.6 mm, 361 mm length
Size: L , XL
TranzX JD-YSP18, 130mm travel, internal routing, 31.6 mm, 425 mm length
Handlebar Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
Grips Bontrager XR Trail Comp, nylon lock-on
*Stem Size: XS , S
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length
Size: M , L , XL
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length
Head set FSA IS-2
Brake rotor Tektro, 6-bolt, 203 mm
Brake Set Tektro HD-M275 hydraulic disc
Rotor size Max brake rotor sizes: Front see fork manufacturer, rear 203 mm
Battery Bosch PowerTube 625Wh, smart system
Charger Bosch standard 2A, 230V, smart system
Controller Bosch Intuvia 100, smart system
Motor Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm, 20 mph or 32 km/h max assist (25 km/h max assist in EU and APAC)
Computer Bosch LED remote, smart system
Weight M - 25.23 kg / 55.63 lbs
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Colours LAVA/ TREK BLACK, MATTE BLACK /GLOSS BLACK
Sizes L - 29 WHEEL, M - 29 WHEEL, S - 27.5 WHEEL, XL - 29 WHEEL, XS - 27.5 WHEEL
Brand Trek
Model Year 2023
Barcodes 601842778272, 601842778289, 601842778296, 601842778302, 601842778319, 601842778326, 601842778333, 601842778340, 601842778357, 601842778364
SKUs / Part Numbers 5277922, 5277923, 5277924, 5277925, 5277926, 5277927, 5277928, 5277929, 5277930, 5277931

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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