Trek Powerfly FS 4 Gen 3
The Powerfly FS 4 is a trail-ready full-suspension electric mountain bike that's eager to roll onto the singletrack. The plush suspension set-up soaks up rough terrain and the powerful Bosch electric drive system boosts your capacity to crush long and punchy climbs and mile after mile of singletrack. The new LED remote and Intuvia 100 display 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 Intuvia 100 display. 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.
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 |
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*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 |
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Shock | SR Suntour Edge R, 190 mm x 45 mm |
Max compatible fork travel | 120mm (XS and S: 520mm axle-to-crown, M and up: 545mm axle-to-crown) |
Hub front | Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle |
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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 | Alex MD35, tubeless compatible, 32-hole, 35 mm width, Presta valve |
*Tyre |
Size: XS , S Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35" |
Size: M , L , XL Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30" |
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Max tyre size | Frame: 29x2.40" (XS & S: 27.5x2.60"), Fork: See manufacturer |
Shifter | Shimano Deore M4100, 10 speed |
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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 | 1x: 46T, min 34T |
Saddle | Bontrager Arvada, steel rails, 138 mm width |
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*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 |
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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 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 |
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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 |
Battery | Bosch PowerTube 625Wh, smart system |
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Charger | Bosch standard 4A, 230V, smart system |
Controller | Bosch Intuvia 100, smart system |
Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
Computer | Bosch LED remote, smart system |
Weight | M - 25.23 kg / 55.63 lbs |
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