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Today’s Deals2021 Trek
Powerfly 4
A 27.5″ / 29″ aluminum frame hardtail trail e-bike with upper mid-range components.
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Manufacturer Price
$3,699| Weight | 23.7 kg |
|---|---|
| Frame | Aluminum |
| Suspension | Hardtail, 120mm |
| Fork | Suntour XCM |
| Wheels | 27.5″ / 29″ Aluminum |
| Drivetrain | 1 × 10 |
| Groupset | Deore |
| Motor | Bosch 250W 85Nm mid-drive |
| Battery | Bosch 500Wh |
| Brakes | Tektro Hydraulic Disc |
137cm – 155cm
153cm – 167cm
161cm – 176cm
173cm – 188cm
186cm – 196cm
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Summary
The Trek Powerfly is a versatile trail e-bike that excels in blending off-road capability with commuting practicality. Its full suspension system, including a SR Suntour Zeron 35 fork and RockShox SID Luxe Select+ rear shock, ensures a smooth ride over rough terrain. The bike is powered by a Bosch Performance Line CX motor and a long-range 625Wh battery, offering both power and endurance for varied rides.
Full suspension system for smooth off-road performance
Bosch Performance Line CX motor with 85Nm torque
Long-range 625Wh battery
Versatile for both trail and commuting use
High-quality components like Shimano XT brakes
High price point
Weight can be a drawback without motor assistance
Some design limitations in accessories like mudguards and rack
The Trek Powerfly FS9 Equipped is an electric bike that makes you want to ride more – it allows you to take the more interesting routes less travelled on your commute and have fun on forest tracks at the weekend.
BikeRadarTrek has created a proprietary rear suspension design called ABP (active brake pivot) that isolates suspension and braking so you won’t lose travel or lock up due to the force of the motor on the chain.
Electric Bike ReviewThe Trek Powerfly FS 9 blends sporty handling, efficient propulsion and long-distance comfort into a harmonious overall concept. The result: pure riding fun!
E-Mountainbike MagazineFeedback?
View all reviews
Sept 2022 · Mike Hunger
We have tested the Trek Powerfly FS 9 Equipped with Bosch Performance Line CX motor and 625 Wh battery for you.
Wide range of applications
Sporty and stylish look
Intuitive handling
Bosch SmartphoneHub ensures good connectivity
None
Feb 2022 · Russell Burton
A well-specified, comfortable and versatile ebike, but at a serious price
Comfort
Range
Stability
Expensive, especially if you’re considering leaving it outside the local shop
Sept 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.
Wide range of applications
Predictable handling
Spec includes high-quality mountain bike components
Many connectivity features through Bosch SmartphoneHub
Untidy cable routing of the cockpitt
Oct 2020
Price: $5999.00 | Model Year: 2021 | A premium
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).
Sept 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.
Sept 2019 · Jordan Villella
- Mtbr.com
Mar 2019
This isn’t the first time you’ve ridden this bike, right? Correct. We attended the launch of this bike last year, but we always prefer to test bikes on home soil in Australian conditions. We went deep on the tech details, so make sure you take a look at our First Impressions piece and video …
An incredible technical climber.
Built tough!
Smooth power delivery.
Excellent Bosch eMTB motor mode.
Slow speed manoeuvrability isn't great.
Quite heavy.
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.
| Frame | Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle BB Standard: Bosch, Press Fit Colors: Lithium Grey / Trek Black; Factory Orange / Lithium Grey; Matte Solid Charcoal / Matte Miami |
|---|---|
| Fork | Size: XS, SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 80mm travel; Size: S, M, L, XL, SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 120mm travel Travel: 120mm Spring Type: Coil |
| Bottom Bracket | Bosch, press-fit |
| Headset | FSA IS-2, 1-1/8'' top, 1.5'' bottom |
| Stem | Size: XS, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: S, M, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: L, XL, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length |
| Handlebar | Size: XS, S, Bontrager alloy, 31.8mm, 15mm rise, 720mm width; Size: M, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width |
| Saddle | Bontrager Commuter Comp |
| Seatpost | Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length Type: Rigid |
| Pedals | VP-536 nylon platform |
| Grips | Bontrager XR Endurance Comp, lock-on |
| Rear Derailleur | Shimano Deore M5120, long cage |
|---|---|
| Crank | FSA Bosch CK-220, 36T ring, 165mm length |
| Shifters | Shimano Deore M4100, 10 speed |
| Cassette | Shimano Deore M4100, 11-46, 10 speed |
| Chain | KMC X10, 10 speed |
| Brakes | Tektro HD-M275 hydraulic disc Type: Tektro Hydraulic Disc |
| Rims | Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve |
|---|---|
| Spokes | 14g stainless steel |
| Front Hub | Formula DC-511, 6-bolt, Boost110, 15mm thru axle |
| Rear Hub | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle |
| Tires | Size: XS, S, Bontrager XR3 Comp, wire bead, 30tpi, 27.5x2.35''; Size: M, L, XL, Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30'' |
| Disc Rotors | Tektro, 6-bolt, 203mm |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist |
|---|---|
| Battery | Bosch PowerTube 500 |
| Remote | Bosch Purion |
| Charger | Bosch compact 2A (100-240V) charger |
First added 10 July
Last updated 16 April
Not listed for 1,869 days