Description
Powerfly FS 4 is a full suspension electric mountain bike built to tackle rugged trail adventures.
The plush suspension set-up soaks up rough terrain, and the powerful Bosch electric drive system boosts your capacity to crush climbs and mile after mile of singletrack.
It’s right for you if…
You want to get out and explore more trails. You’re looking for an e-MTB with trail-smoothing full suspension and the reliable, leg-boosting power of an electric drive system made specifically for the demands of off-road riding.
The tech you get
A durable aluminium frame that fully encases a long-range 500 Wh battery, a powerful Bosch Performance CX (250 Wh, 75 Nm) motor that helps you sustain speeds of up to 20 mph (25 km/h in Europe) or 32 km/h and an ergonomic Purion controller. Plus, an SR Suntour 120 mm suspension fork, 100 mm 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 is comfortable, efficient and fast on rough terrain. The powerful Bosch electric drive system makes it possible to tackle any climb you encounter and adventure farther than ever.
Why you’ll love it
- For e-MTB, full suspension is a game-changer: it soaks up rugged terrain, so you can ride the Bosch pedal-assist system to its full potential
- Trek’s Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy to remove the battery without tools and lets you mount a water bottle cage – even on full suspension e-MTBs
- The dropper post lets you lower your saddle on the fly so it’s out of the way on descents
- The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
- The size S frame features a curved top tube that makes standing over the bike easier. Plus, Smart Wheel Sizing means you’ll get the fastest wheel that fits 29″ wheels on larger frames, 27.5″ wheels on smaller frames
Why we won’t ship unbuilt Trek Bikes
Due to warranty regulations, Trek bikes must be assembled by a qualified bike mechanic in an approved store. This is an international policy for Trek bikes. Therefore, any Trek Bicycle purchased online must be picked up from Velo Ronny’s or contact us for further options.
*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.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
| Frame | Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armour, magnesium 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, 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 |
|
| Shock | SR Suntour Edge R, 190 mm x 45 mm |
| Max compatible fork travel | 120mm (XS & S: 520mm axle-to-crown, M & up: 545mm 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 | Alex MD35, tubeless compatible, 32-hole, 35 mm width, Presta valve |
| *Tyre | Size: XS , S Bontrager XR3 Comp, wire bead, 30 tpi, 27.5×2.35″ |
| Size: M , L , XL Bontrager XR3 Comp, wire bead, 30 tpi, 29×2.30″ |
|
| Rim strip | Bontrager TLR |
| Max tyre size | Frame: 29×2.40″ (XS & S: 27.5×2.60″) Fork: See manufacturer |
Drivetrain
| Shifter | Shimano Deore M4100, 10 speed |
|---|---|
| Rear derailleur | Shimano Deore M5120, long cage |
| Crank | FSA Bosch CK-220, 36T ring, 165 mm length |
| Cassette | Shimano Deore M4100, 11-46, 10-speed |
| Chain | KMC X10, 10-speed |
| Pedal | VP-536 nylon platform |
| Max. chainring size | Max: 46T, Min 34T |
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 |
| Size: L , XL TranzX JD-YSP18, 130mm travel, internal routing, 31.6 mm, 425 mm length |
|
| 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 alloy, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length |
|
| Brake rotor | Tektro, 6-bolt, 203 mm |
Accessories
| Battery | Bosch PowerTube, vertical, 500 wh |
|---|---|
| Charger | Bosch compact 2A, 100–240V, smart system |
| Controller | Bosch Purion |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand |
Weight
| Weight | M – 24.83 kg / 54.75 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
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