It's right for you if...
You like singletrack trails and want an e-MTB with a more capable full suspension set-up so you can take on more rugged adventures and stay comfortable and efficient when you do.
The tech you get
A durable Alpha Aluminium frame that fully encases a long-life 500 Wh battery, a powerful Bosch Performance CX 250w drive system that helps you sustain speeds of up to 25 km/h and an ergonomic Purion controller. Plus, a SR Suntour XCR 34 130mm suspension fork with an adjustable air spring, a 130 mm RockShox Deluxe RL shock, a 10-speed Shimano drivetrain and hydraulic disc brakes.
The final word
Full suspension lets you take on bigger, more technical trails. It's more comfortable, more efficient and faster in rough terrain. You're getting great parts and a powerful Bosch e-MTB system, but the biggest advantage of Powerfly FS 4 is the suspension package built for better riding on rugged trail adventures.
favorite_borderWhy 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
- It's equipped with an external charging port for easy charging on or off the bike
- It rides like a mountain bike because it is one: it has the same frame and suspension tech that we've refined in our decades-long trail heritage
- The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
Bosch Performance Line CX
Bosch's Performance Line CX motor is made specifically for off-road use with more torque and power for better acceleration. The intelligent eMTB mode automatically adjusts the amount of assist to match the terrain. It's a set-and-forget mode that delivers just the right amount of power. You get optimum control, traction and battery life so you can focus on enjoying the ride.
This unique protection shield made of lightweight but robust aluminium protects the motor against stones.
Control Freak cable management
The lightest, quietest, most versatile cable management system allows any combination of shift, brake, lockout and dropper post lines to be routed through the frame for clean looks and the ultimate custom set-up.
Rear kickstand mount
Chainstay mounts make it easy to install a rear kickstand that stays out of your way and supports bikes of all sizes. No more laying or leaning.
Internal dropper compatible
Internal routing ports make it easy to add a dropper post upgrade that lets you lower your saddle on the fly so it's out of your way for tricky sections of trail.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, Motor Armor, magnesium rocker link, Mino Link, ABP, Boost148, 130 mm travel|
|Fork||SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44 mm offset, Boost110, 15 mm bolt-on thru axle, 130 mm travel|
|Front hub||Formula DC-511, 6-bolt, Boost110, 15 mm thru axle|
|Rear hub||Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle|
|Rear skewer||Bontrager Switch thru axle, removable lever|
|Rim||Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve|
|Tyre||Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35"|
|Shifter||Shimano Deore M6000, 10-speed|
|Rear derailleur||Shimano Deore M6000, mid cage, 42T max cog|
|Crank||FSA 310, 15T w/chain guard, 170 mm length|
|Cassette||SunRace, 11-42, 10-speed|
|Chain||KMC X10, 10-speed|
|Pedal||VP-536 nylon platform|
|Saddle||Bontrager Arvada, steel rails, 138 mm width|
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
M, M/L, L, XL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
|Handlebar||Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width|
|Grips||Bontrager XR Trail Comp, nylon lock-on|
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 60 mm length
M, M/L, L
Bontrager Rhythm Comp, 31.8 mm, Knock Block, 0-degree, 70 mm length
Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 80 mm length
|Brake||Tektro HD-M275 hydraulic disc|
|Brake rotor||Tektro, 180mm, 6-bolt|
|Battery||Bosch PowerTube, vertical, 500 wh|
|Motor||Bosch Performance CX, 250 Watt, 75 Nm, 25 km/h max assist|
- Weight limit
- This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Sizing & fit
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
153.0 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
All measurements provided in cm unless otherwise stated.
|Frame size number||Frame size letter||Geometry position||Wheel size||A — Seat tube||B — Seat tube angle||Effective seat tube angle||C — Head tube length||D — Head angle||E — Effective top tube||F — Bottom bracket height||G — Bottom bracket drop||H — Chainstay length||I — Offset||J — Trail||K — Wheelbase||L — Standover||M — Frame reach||N — Frame stack|