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Today’s DealsPowerfly 4 Gen 4
A 27.5″ / 29″ aluminum frame hardtail trail e-bike with upper mid-range components.
Manufacturer Price
$3,649| Weight | 52.8 lbs |
|---|---|
| Frame | Aluminum |
| Suspension | Hardtail, 120mm |
| Fork | Suntour XCM |
| Wheels | 27.5″ / 29″ Aluminum |
| Drivetrain | 1 × 10 |
| Groupset | Deore |
| Motor | Bosch 600W 85Nm mid-drive |
| Battery | Bosch 500Wh |
| Brakes | Tektro Hydraulic Disc |

Sep 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

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.
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).

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.
| Frame | Size: XS, S, Alpha Platinum Aluminum, curved top tube, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle; Size: M, L, XL, 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 Tire Clearance: 2.6" Color: Living Coral /Solid Charcoal |
|---|---|
| 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 Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: S, M, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: L, XL, Bontrager Comp, 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, black |
| Front Hub | Formula DC-511, 6-bolt, Boost110, 15mm thru axle |
| Rear Hub | Bontrager Approved DC-3248, 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 Line CX, smart system, magnesium motor body, 85 Nm |
|---|---|
| Battery | Bosch PowerTube 500Wh, smart system |
| Remote | Bosch Intuvia 100, smart system |
| Display | Bosch LED remote, smart system |
| Charger | Bosch standard 4A, 110V, smart system |
First added March 25
Last updated October 11
Not listed for 238 days