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2020 Trek

Powerfly FS 4 G2

A 27.5″ aluminum frame full suspension trail e-bike with upper mid-range components.

Manufacturer Price

€3,899($4,536)
FrameAluminum
SuspensionFull, 130 / 130mm
ForkSuntour XCR Air
Wheels27.5″ Aluminum
Drivetrain1 × 10
GroupsetDeore
MotorBosch 250W 85Nm mid-drive
BatteryBosch 500Wh
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Powerfly FS 4 G2
Other Trail bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

11 mph

Powerfly FS 4 G2

26 mph

Similar Bikes

Highest gear

(descending)

Reviews
E-Mountainbike Magazine
Trek Powerfly FS 9 Equipped in review – A new generation of E-trekking bike

Sep 2021 · Rudolf Fischer

In our E-trekking bike group test, Trek enter the race with the Powerfly FS 9 Equipped with its Bosch Performance CX motor and many sporty features.

Highs
  • Wide range of applications

  • Predictable handling

  • Spec includes high-quality mountain bike components

  • Many connectivity features through Bosch SmartphoneHub

Lows
  • Untidy cable routing of the cockpitt

Read Review

Electric Bike Review
Trek Powerfly FS 9 Equipped Review

Oct 2020

Price: $5999.00 | Model Year: 2021 | A premium

Observations
  • A premium "do anything" full suspension electric bike that's equipped to handle pavement, trails, light mountain terrain, rain, shine, day, or night conditions. Available in five frame sizes for optimal fit, the XS and S come with 27.5" wheels and the M, L, and XL come with 29" wheels. Sold through one of North America's largest network of dealers. Trek and Bosch provide excellent support and warranty.

  • Custom made extra-wide plastic fenders are durable and quiet, very capable in off-road conditions. A sleek and sturdy rear rack provides 25kg (55lbs) of cargo capacity with pannier hangers on both sides and a removable top platform for trunk bags. Puncture resistant tires also feature unique black reflective stripes that combine safety with aesthetics.

  • Downtube-integrated battery pack and mid-drive motor keep weight low and center. Trek designed a "RIB" battery casing includes a handle for safe removal and transport. The battery doesn't rattle, and it can be charged on or off the bike with the fast 4 amp charger. Peformance Line CX motor is the most powerful from Bosch, but lightweight with a magnesium casing.

  • Highly adjustable air suspension front and rear with 120mm and 100mm travel respectively. Boost hub spacing and thru-axles increase wheel strength. Extra large 203mm hydraulic disc brakes with heat sinks and alloy cores deliver incredible stopping power. The biggest trade-offs here include the high price, smartphone display (that some may not like), louder motor operation, and increased weight (due to the high capacity battery and accessories).

Read Review

Bikerumor
All-new Trek Powerfly full suspension e-MTBs hit the trails...and the street?

Sep 2020 · Tyler Benedict

The 2021 Trek Powerfly full suspension e-MTBs blend European sensibility with modern trail capability for a unique e-mountain bike option.

Read Review

Loam Wolf
Review: Trek Powerfly LT 7 Plus

Jan 2019

If I had to think of one common theme that continually came up during our time with the Powerfly, that would be it—too damn fun. Over the months we’ve had this bike, we’ve done it all and it does it all with ease.

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MBR
Trek Powerfly 9 LT (2019) first ride review - MBR

Oct 2018 · Alan Muldoon

Up hill or down, ebikes take an absolute beating, so the new Trek Powerfly 9 has a beefed up the parts package to handle the additional abuse.

Highs
  • Suspension, brakes and tyres are all on point. New battery layout is neat and easy to use.

Lows
  • Could have more generous reach measurements and shorter stems on all sizes.

Read Review

Flow Mountain Bike
Trek Powerfly 7 FS e-bike review - ridden and rated

Feb 2018

Built on the bones of the legendary Fuel series, the Trek Powerfly 7 FS is the top-of-the-line e-bike for Trek in Australia. It's got great pedigree, but we didn't love every aspect of its performance

Highs
  • Top notch build quality.

  • Frame feels indestructible.

  • Great rear suspension.

  • Torquey motor with plenty of range.

  • Will climb anything you point it at.

Lows
  • RockShox Recon fork isn't up to scratch.

  • Long rear end makes for sedate feel.

Read Review

MTBR
2018 Trek Powerfly FS 130mm e-bike

Jul 2017 · Francis Cebedo

The Trek line of e-bikes continuous to evolve with better integration and better components for the mountain bike experience. - Mtbr.com

Read Review

BikeRadar
Trek Powerfly FS 9 LT review

Jun 2017 · Oli Woodman

An exceptionally capable package which will take you further and faster without the need for a lift pass. Buy if you’d like to scale climbs almost as quickly as descents and aren’t afraid to be a little different

Highs
  • Long wheelbase makes for almost absurd stability, superb mechanical grip from well-matched and supportive suspension, Drivetrain and motor play very well together, components list features plenty of excellent e-bike specific parts

Lows
  • Flimsy tyres are at odds with the rest of the bike, New ‘e-mtb’ power mode perhaps a little too keen for some

Read Review

Geometry
Specs
Build
Frame

Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, Motor Armor, magnesium rocker link, Mino Link, ABP, Boost148, 130 mm travel

Tire Clearance2.8"

ColorMatte Battleship / Gloss Black

Fork

SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44 mm offset, Boost110, 15 mm bolt-on thru axle, 130 mm travel

Travel130mm

Spring TypeAir

Stem

Size: S, Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 60 mm length; Size: M, M/L, L, Bontrager Rhythm Comp, 31.8 mm, Knock Block, 0-degree, 70 mm length; Size: XL, Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 80 mm length

Handlebar

Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width

Saddle

Bontrager Arvada, steel rails, 138 mm width

Seatpost

Size: S, Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length; Size: M, M/L, L, XL, Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length

TypeRigid

Pedals

VP-536 nylon platform

Grips

Bontrager XR Trail Comp, nylon lock-on

Groupset
Rear Derailleur

Shimano Deore M6000, mid cage, 42T max cog

Crank

FSA 310, 15T w/chain guard, 170 mm length

Shifters

Shimano Deore M6000, 10-speed

Cassette

SunRace, 11-42, 10-speed

Chain

KMC X10, 10-speed

Brakes

Tektro HD-M275 hydraulic disc

TypeTektro Hydraulic Disc

Wheels
Rims

Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve

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

Tires

Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35"

Disc Rotors

Tektro, 180 mm, 6-bolt

Electric Components
Motor

Bosch Performance CX, 250 Watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand

Battery

Bosch PowerTube, vertical, 500 wh

Remote

Bosch Purion

Charger

Bosch compact 2A (100-240 V) charger

Rider Notes
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First added January 27

Last updated July 25

Not listed for 1,778 days