Trek FX+ 1S Midstep

FX+ 1S Midstep is a versatile and fast throttle e-bike built for cruising through town with a smile, ear-to-ear. Its handlebar throttle makes getting up to speed a breeze, and pedal assist gives you a smooth boost while you ride. Plus, an EasyMag magnetic charger with a sleek, portable wall-mounted system makes charging between rides easier than ever. This class 3 e-bike is prohibited from sale in California under CA SB 1271 and cannot be shipped to California.

• You get the convenience of a throttle for accelerating and the smooth support of pedal assist while you ride
• The portable magnetic wall-mount charger makes getting your battery ready to ride a hassle-free process
• Wide, stable tires deliver tons of traction and confidence for riding through town, on paths, and on rail trails
• Integrated lights, turn signals, and brake light help you see and be seen wherever you roll
• You get low-maintenance, reliable shifting thanks to Shimano's 8-speed ESSA drivetrain

Throttle up the fun

With the push of a button, the easy-to-use throttle lets you flatten hills, ride further, and adventure longer, without breaking a sweat.

Send the right signals

FX+ 1 comes equipped with a bright, rear taillight with an integrated brake light and turn signals for increased visibility on the road.

EasyMag for easy charging

Designed with a hassle-free magnetic attachment to charge, bright LED status lights, and an optional wall mount, EasyMag lets you charge at home or on the go.

Get connected

FX+ 1 pairs with the Trek Central app so you can easily adjust your bike's settings for longer range, map the perfect routes, track your ride stats, and so much more!

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

Compliant with leading safety regulations

The e-systems on Trek and Electra e-bikes are third-party tested to meet the latest e-bike safety regulations, including the stringent UL 2849 certification — so all you have to worry about is where your e-bike will take you next.

Frame	Alpha Gold Aluminum, internal cable routing, internal battery, rack & fender mounts, flat mount disc brake, kickstand mount, 144.5mm OLD hub motor spacing
Fork	Alloy, internal brake routing, fender mounts, rack mounts, ThruSkew 5mm bolt-on skewer
Tire	Bontrager GR0 Comp, wire bead, 60 tpi, 650x50mm
Hub Front	Alloy low-flange w/6-bolt disc, 36h, w/QR
Rim	Alloy double wall, 36h
Skewer Front	132x5mm QR, ThruSkew
Shifter	Shimano M315, 8 speed
Rear Derailleur	Shimano ESSA U2000
Crank	Alloy, 40T steel chainring, 170mm length
Cassette	Shimano HG400, 11-45, 8 speed
Chain	KMC Z8.3
Brake	Rush BH-286 hydraulic disc, 180mm rotor // Rush BH-286 hydraulic disc, 180mm rotor
Pedal	Bontrager City pedals
Saddle	Bontrager Sport Women's
Seatpost	Bontrager alloy, 31.6mm, 12mm offset, 330mm length
Seat Collar	Bolt-on, 36.4mm
Handlebar	Bontrager alloy, 31.8mm, 15mm rise, 690mm width
Stem	Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length
Grips	Bontrager XR Endurance Comp, lock-on
Light	Herrmans MR8, 180 lumen, 60 lux, LED headlight // Sate-Lite M-15 with turn signal and brake light function
Kickstand	Adjustable length alloy kickstand
Battery	520Wh, integrated in down tube
Motor	Hub drive motor, 60 Nm, 500W, 36H, black
Charger	Trek Easy Mag charger, 2.7A, 54.9V output, 100V-240V AC input

Geometry Chart

B B Drop	7
B B Height	28.6
Chainstay Length	46.8
Eff Top Tube	56.9
Frame Reach	38.2
Frame Size Letter	S
Frame Size Number	45cm
Frame Stack	60.4
Head Angle	70.0°
Head Tube Length	15.5
Offset	5
Seat Tube	40.8
Seat Tube Angle	73.5°
Standover	65.5
Trail	7.6
Wheelbase	109.2
Wheel Size	700c