2022 Trek Powerfly 4 FSRegular price $7,999.00
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 km after km 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, 85 Nm) motor that helps you sustain speeds of up to 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.
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.
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
TREK 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.
*spec applies to all sizes unless otherwise noted
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)
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, 27.5x2.35"
Size: M , L , XL
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30"
Rim strip Bontrager TLR
Max tyre size Frame: 29x2.40" (XS & S: 27.5x2.60") Fork: See manufacturer
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
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
Battery Bosch PowerTube, vertical, 500 wh
Charger Bosch compact 2A, 100–240V, smart system
Controller Bosch Purion
Motor Bosch Performance Line CX, magnesium motor body, 85 Nm, 32 km/h
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).