Powerfly FS 4 Equipped Gen 2

Overview

You're looking for a powerful e-MTB with trail-smoothing full suspension that you can take on the trail and around town. You want your bike to come stocked with ride-ready features like a rack, mudguards and lights.

A durable aluminium frame that fully encases a long-range 625 Wh battery, a powerful Bosch Performance CX (250 Wh, 85 Nm) motor that helps you sustain speeds of up to 25 km/h and a Kiox controller. 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 is comfortable, efficient and fast on rough terrain. The powerful Bosch electric drive system and loads of utility features tackle any adventure you seek.

It comes equipped with mudguards, a rear boot rack and lights that are powered by the battery so you're ready to ride right from the start
The full-colour Kiox controller displays 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
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

'The Powerfly FS blends sporty handling, efficient propulsion and long-distance comfort into a harmonious overall concept. The result: pure riding fun! '

'The jury was enthralled by the upright and comfortable riding position on long tours while the bike also shines on moderate terrain thanks to its fun ride and intuitive handling.'

2023

Powerfly FS 9 Equipped Gen 2

€7,699.00 (MSRP)

2022

Powerfly 7 Equipped Gen 2

€5,599.00 (MSRP)

2022

Powerfly Sport 4 Equipped

€3,899.00 (MSRP)

Guidelines and tips for protecting and sharing the trails you ride.

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Do this quick pre-ride safety check before you hit the trails.

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Features

The Bosch Performance Line CX sets the standard for eMTB performance with up to 85 Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain.

Trek eMTBs feature a custom eMTB Lite mode in place of Tour mode. It gives you more natural-feeling power delivery and longer battery life.

RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security or just easier charging.

Watch the video

The Powerfly Equipped gives you maximum utility thanks to pre-installed accessories. You get a kickstand, front and rear lights, plus mudguards and a rear rack custom made for clean integration.

To see how far you can ride your electric mountain bike on a single charge, check out Bosch’s range calculator. We’ve auto-filled the variables for this bike model and the average rider, but you can make adjustments to get your most accurate estimate.

Calculate your range

This suspension calculator will help you optimise your suspension settings for your riding weight. Simply follow the steps to find your best set up.

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Bosch Kiox's bright, full-color screen is easy to read in any light conditions and is protected by durable Gorilla Glass. You can view battery life, support level, speed, heart rate, and more. Plus, it seamlessly connects to your phone through the Bosch eBikeConnect app to share ride data, GPS map routes, altitude, cadence, and power output.

The right wheel size paired with your frame size gives you the perfect combination of responsiveness and control.

Use the remote lever to lower your saddle so it's out of your way when you're descending and cornering.

You've got one less detail to sweat with the integrated speed sensor. The chainstay-mounted sensor stays protected while the custom hub-mounted magnet stays secure – no more error codes from mis-aligned sensors.

Specs

Frame	Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armour, magnesium 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	120mm (XS & S: 520mm axle-to-crown, M & up: 545mm 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	Size: XS , S Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23 mm width, Presta valve
Size: M , L , XL Bontrager Kovee, double-wall, Tubeless-Ready, 32-hole, 23 mm width, Presta valve
*Tyre	Size: XS , S Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 27.5x2.40"
Size: XS , S Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35"
Size: M , L , XL Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 29x2.40"
Max tyre size	Frame: 29x2.40" (XS & 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	VP-536 nylon platform
Max. chainring size	Max: 46T, Min 34T

Saddle	Bontrager Commuter Comp
*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	Size: XS , S , M , L , XL Bontrager XR Endurance Comp
Size: XS , S , M , L , XL Bontrager XR Endurance Comp, 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

Battery	Bosch PowerTube 625
Charger	Bosch compact 2A, 100–240V, smart system
Controller	Bosch Kiox with Anti-theft solution
Motor	Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand
*Light	Size: XS , S , M , L , XL Supernova E3 Mini-2 rear light, LED
Size: XS , S , M , L , XL Herrmans MR8e front light, 180 lumen, 60 lux
Computer	Bosch Kiox with Anti-theft solution
Kickstand	Pletscher Comp Flex 18
Cargo rack	MIK Compatible alloy rear rack
*Mudguard	Size: XS , S , M , L , XL Trek Powerfly FS custom mudguard
Size: XS , S Trek Powerfly 27.5" custom fender
Size: M , L , XL Trek Powerfly 29" custom fender

Weight	M - 27.38 kg/60.37 lb
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

Sizing

Geometry

Service

Reviews

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'Powerfly FS wins Best in Test'

E-MTB Category Winner

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Suspension Calculator

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Bosch Kiox display

Smart Wheel Size

Dropper post

Integrated speed sensor