Powerfly FS 9 EQ is a full suspension electric mountain bike that's built for singletrack sessions and rugged commutes. You get high-end parts, a powerful drive system, and a rad suspension setup for tackling rougher trails. And, it comes with utility-focused features for daily riding, like fenders, lights, and a rear rack.
It's right for you if…
You want a super versatile full suspension e-MTB to take out on the trail. You also want it to come equipped with commute-ready accessories so you can bring home the bacon and get a little shreddy on your way back from work.
The tech you get
A durable aluminum frame that fully encases a long-range 625Wh battery, a powerful Bosch Performance CX motor that helps you sustain speeds of up to 20 mph or 32 km/h, and a SmartphoneHub controller that can be used with or without your phone. Plus, a 120mm suspension fork, 100mm of rear travel, powerful 4-piston hydraulic brakes, Bontrager Line Comp 30 wheels, a 12-speed Shimano XT drivetrain, and a dropper post for getting low on descents.
The final word
Our best Powerfly FS rips rough trails, rail trails, and rugged commutes thanks to a plush suspension setup, powerful drive system, and loads of utility features.
Why you'll love it:
- It comes equipped with fenders, a rear trunk rack, and lights that are powered by the battery so you're ready to ride right from the start
- Download the COBI.Bike app and your phone becomes an on-board computer. Attach it to SmartphoneHub to charge, make or take calls, listen to music, get turn-by-turn directions, and more
- Wide Line Comp 30 wheels provide more tire support so you get better traction and control
- 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 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
- Sizes X-Small – Small: 27.5-inch
- Sizes Medium – X-Large: 29-inch
|A — Seat tube (cm)||36.8||39.5||42||45||50|
|B — Seat tube angle||68.3°||68.3°||67.5°||67.5°||67.5°|
|Effective seat tube angle||76.0°||76.0°||76.0°||76.0°||76.0°|
|C — Head tube length (cm)||14||14||13||14||14|
|D — Head angle||66.5°||66.5°||66.5°||66.5°||66.5°|
|E — Effective top tube (cm)||55.4||56.4||58.9||62.1||64.6|
|F — Bottom bracket height (cm)||33.2||33.2||33.5||33.5||33.5|
|G — Bottom bracket drop (cm)||2.4||2.4||3.9||3.9||3.9|
|H — Chainstay length (cm)||46.8||46.8||47||47||47|
|I — Offset (cm)||4.4||4.4||4.4||4.4||4.4|
|J — Trail (cm)||10.7||10.7||11.4||11.4||11.4|
|K — Wheelbase (cm)||117||118||120.6||124||126.5|
|L — Standover (cm)||69.1||69.1||71.2||71.6||71.3|
|M — Frame reach (cm)||40.5||41.5||43||46||48.5|
|N — Frame stack (cm)||59.9||59.9||63.7||64.6||64.6|
|Frame Size||Height (inches)||Height (cm)||Inseam (inches)||Inseam (cm)|
Due to supply-chain issues, Specs are subject to change without notice.
|Frame||Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armor, magnesium rocker link, rack and fender mount, ABP, Boost148, 100mm travel|
|Fork||SR Suntour Zeron 35, air spring, LO R damper, hydraulic lockout, tapered steerer, 44mm offset, Boost110, 15mm bolt-on thru axle, 120mm travel|
|Rear Shock||RockShox SID Lux Select+, 190 x 45mm|
Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 54, 6-bolt, Boost148, 12mm thru axle (Sizes XS & S); Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle (Sizes M, L, XL)
|Rims||Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle|
Sizes XS & S: Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 27.5x2.40"
Sizes M, L, XL: Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 29x2.40"
|Crankset||E*thirteen E*spec Plus, 34T, 165mm length|
|Shifters||Shimano XT M8100, 12 speed|
|Rear Derailleur||Shimano XT M8100, long cage|
|Cassette/Freewheel||Shimano XT M8100, 10-51, 12 speed|
|Chain||Shimano Ultegra/XT M8100, 12 speed|
|Brakes||Shimano XT M8120 4-piston hydraulic disc|
|Rotors||Shimano RT76, 6-bolt, 203mm|
|Handlebars||Bontrager alloy, 31.8mm, 15mm rise, 750mm width|
|Tape/Grips||Bontrager XR Endurance Comp, lock-on|
|Stem||Bontrager Elite, 31.8mm, Blendr light mount, 7 degree rise|
|Seatpost||Bontrager Line Dropper, internal routing, 31.6mm|
|Saddle||Bontrager Commuter Comp|
|Accessories & Extras||
Front Light: Supernova Mini 2, 5-21V LED headlight
Rear Light: Supernova E3 Mini-2 rear light, LED
Kickstand: Pletscher Comp Flex 18
Cargo rack: MIK Compatible alloy rear rack
Fender: Trek Powerfly custom fender (Sizes XS & S = 27.5", Sizes M, L, XL = 29")
|Motor||Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist|
|Battery||Bosch PowerTube 625|
|Charger||Bosch standard 4A (100-240V) charger|
* Subject to change without notice.
|Matte Black /Gloss Trek Black / X-Small / 27.5-inch||601842597880||5260926||POW44729308K|
|Matte Black /Gloss Trek Black / Small / 27.5-inch||601842597873||5260927||POW43301791K|
|Matte Black /Gloss Trek Black / Medium / 29-inch||601842597866||5260928||POW42856704K|
|Matte Black /Gloss Trek Black / Large / 29-inch||601842597859||5260929||POW42474718K|