Powerfly 4 Women's | Trek Bikes (GB)
  1. Loading...


Powerfly 4 Women's

£2,300.00 Model 22050

The Powerfly 4 is our most affordable electric mountain bike. This e-MTB is built with parts that hold up, like a dependable 9-speed Shimano drivetrain, a 100 mm RockShox fork, 27.5˝ wheels, a frame and touchpoints designed for women and a Bosch Performance CX motor that assists up to 25 kph. This bike expands your boundaries, and lets you travel to destinations that you never thought you'd reach on a mountain bike.

Search shop availability

It's right for you if...

You're sold on the e-bike revolution and want the capability and versatility of a mountain bike at a price that doesn't resemble the car you're trying to use less. You want bigger, better trail adventures and know that an e-MTB is the best way to get them.

The tech you get

A durable Alpha Aluminium frame with a lower standover height for added confidence, a Bosch Performance CX 250-watt motor that assists up to 25 kph, an ergonomic Bosch Purion controller and a long-range 500 wH battery that's secure while you're riding, but easy to remove for charging. Plus, a new smart e-MTB mode that manages the assist level automatically, a Shimano drivetrain, a RockShox XC30 fork, hydraulic disc brakes and a saddle designed for women.

The final word

Our most affordable women's electric mountain bike is equipped with performance parts and a high-end Bosch motor, battery and controller for confidence and a fun boost on the trails and roads.

favorite_borderWhy you'll love it

  1. This bike expands boundaries: the top-notch Bosch system is equally suited to commuting, recreation and a ridiculously fun time on the trails
  2. The proven Bosch electric-assist system is natural and intuitive, and makes you feel like you have super-charged legs
  3. This bike is built for the long-haul: it comes as standard with a 500 wH battery, the longest-range available from Bosch
  4. The unique women's frame has a lower standover height for extra confidence

More options



  • Frameset

    Women's Alpha Gold Aluminium, E2 tapered head tube, internal derailleur routing, Balanced Geometry
    Front suspension
    RockShox XC 30, coil spring, preload, TurnKey lockout, 100 mm travel
  • Wheels

    Front hub
    Formula DC20 alloy
    Rear hub
    Formula DC22 alloy
    Bontrager Connection 32-hole double-walled
    Bontrager XR3, 27.5x2.30˝
  • Drivetrain

    Shimano Altus M2000, 9-speed
    Rear derailleur
    Shimano Acera M3000, Shadow
    RIDE+ aluminium 15T w/chainguard
    Shimano HG200, 11-36, 9-speed
    KMC X9
    Wellgo nylon platform
  • Components

    Bontrager Evoke 1.5 Women's
    Bontrager SSR, 2-bolt head, 31.6 mm, 12 mm offset
    Bontrager alloy, 31.8 mm, 15 mm rise
    Bontrager Race Lite, lock-on
    Bontrager alloy, 31.8 mm, 7-degree, Blendr compatible
    Head set
    FSA IS-2, 1-1/8˝ top, 1.5˝ bottom
    Brake set
    Tektro M285 hydraulic disc
  • Accessories

    Bosch PowerPack 500 Wh downtube
    Bosch Purion
    Bosch Performance CX, 250 watt, 75 Nm
  • Weight

    15.5" - 23.40 kg / 51.59 lbs (with tubes)
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
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, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

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.


Rider Height


All measurements provided in cm unless otherwise stated.

Frame size number A — Seat tube B — 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 K — Wheelbase L — Standover M — Frame reach N — Frame stack Frame rise
15.5 in 40.0 73.0° 14.0 69.0° 55.5 32.0 4.8 46.5 4.4 109.5 72.5 36.5 62.1 62.1
17.5 in 42.5 72.5° 14.0 69.0° 57.8 32.0 4.8 46.5 4.4 111.2 72.0 38.2 62.1 62.1

Product Compare Rack

Start comparison
United Kingdom / English
You’re looking at the United Kingdom / English Trek Bicycle website. Don’t worry. We’ve all taken a wrong turn before. View your country’s Trek Bicycle website here.