The Powerfly FS 4 is a full-suspension electric mountain bike that's eager to hit the trail. It packs in plush suspension to soak up rough-terrain and a powerful Bosch drive system to boost your capacity to crush long climbs and mile after mile of singletrack. It's equipped with Bosch's latest LED remote and Purion display that pair with the eBike Flow app to give you activity tracking, navigation and Bluetooth connectivity.
It's right for you if...
You want to boost your mountain biking capabilities with a high-end pedal-assist system. You plan to hit the trail often, and want an upgraded parts spec that'll help you push your limits.
The tech you get
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 Purion display. Plus, an SR Suntour 100 mm suspension fork, 100 mm of rear travel, a 9-speed Shimano CUES drivetrain, powerful hydraulic disc brakes and a dropper post.
The final word
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.
| 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, 41mm offset, oversized crown for eMTB, Boost110, 15 mm bolt-on thru axle, 100 mm travel |
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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, 100 mm travel |
|
| Shock | SR Suntour Edge R, 190 mm x 45 mm |
| Max compatible fork travel | 120mm (540mm axle-to-crown), XS and S: 120mm (520mm axle-to-crown) |
Wheels
| 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 | Bontrager Kovee, double-wall, Tubeless-Ready, 32-hole, 23 mm width, Presta valve |
| *Tyre |
Size: XS , S Bontrager XT3 Comp, wire bead, 30 tpi, 27.5x2.40" |
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Size: M , L , XL Bontrager XT3 Comp, wire bead, 30 tpi, 29x2.40" |
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| Max tyre size | Frame: 29x2.60" (XS & S: 27.5x2.60"), Fork: See manufacturer |
E-system
| Battery | Bosch PowerTube 625Wh, smart system |
|---|---|
| Charger | Bosch standard 2A, 230V, smart system |
| Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
Drivetrain
| Shifter | Shimano U4000, 9-speed |
|---|---|
| Rear derailleur | Shimano CUES U4000 |
| Crank | FSA Bosch CK-220, 36T ring, 165 mm length |
| Chainring | FSA, 36T, steel |
| Cassette | Shimano LINKGLIDE LG300, 11-46, 9-speed |
| Chain | Shimano LG500, 9/10/11-speed |
| Pedal | VP-536 nylon platform |
| Max. chainring size | 1x: 46T |
Components
| 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 |
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Size: L , XL TranzX JD-YSP18, 130mm travel, internal routing, 31.6 mm, 425 mm length |
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| 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 Comp, 31.8 mm, Blendr compatible, 7-degree, 60 mm length |
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Size: M , L , XL Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length |
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| 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 - Frame: 203mm, Fork: see fork manufacturer |
Weight
| Weight | M - 25.65 kg / 56.55 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
