Powerfly FS 4 2021

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Powerfly FS 4 is a full suspension electric mountain bike built to tackle rugged trail adventures. The plush suspension setup soaks up rough terrain, and the powerful Bosch electric drive system boosts your capacity to crush climbs and mile after mile of singletrack.

Last updated on March 24, 2023 6:10 pm

Powerfly FS 4 2021 Prices

Price History

Price history for Powerfly FS 4
Latest updates:
  • $4,249.99 - March 10, 2023
  • $4,749.99 - December 23, 2022
  • $2.00 - October 6, 2022
Since: October 6, 2022
  • Highest Price: $4,749.99 - December 23, 2022
  • Lowest Price: $2.00 - October 6, 2022


The excellent suspension system of the Powerfly FS 4 2021 electric mountain bike is meant to handle a diverse range of terrain. Not only that, the Powerfly FS 4 consist of high power electric drive motor as well. Due to the same, navigating any mountainous trail is not going to be a problem. You can easily cover such trails. The rugged construction ensures that wear and tear is not going to be an issue either. The combination of these features makes this bike a good choice. There are a handful of other features of this bike that certainly help it stand out. We will cover the same below.

Smart mode on offer

ezgif 2 f8e2d4a93cf7 Powerfly FS 4 2021

The Bosch Performance CX motor ensures that you get 85 Nm of torque. Not only that, it has an intelligent eMTB lite mode on offer which enhances your riding experience. The smart motor will sense the terrain which you are navigating. Accordingly, it can provide you with a boost. This feature makes riding a bike on any trail easy.

If you want to use it in the pedal-assist mode, that is certainly possible. The pedal assist mode further increases the range which the bike provides.

The 85 Nm of torque is suitable for an average adult to cover the mountainous terrain. That is why you will not have to worry about any trail when you’re using this bike.

Powerfly FS 4 2021

Removable integrated battery system

The advantage of this battery system is that once you integrate it with the bike, it is completely hidden. You will not have to worry about the wear and tear of the battery or rock and debris affecting the battery.

If you want to remove the battery for any reason, you can do so without any tools. Also, once you remove it, you can use the same space as a water bottle cage. The choice is entirely yours.

The easy to access battery certainly helps this mountain bike stand out.

Easy to adjust saddle

The bike consists of a proper post. The advantage of this post is that it becomes easier for you to adjust the saddle. You need not spend ample time doing so. Since you can adjust the saddle easily, navigating the ascent as well as descent becomes easy. You can customize your sitting position and accordingly control the bike.

The numerous modes on offer, excellent battery system, and efficient suspension ensure that this bike will not give you any trouble on mountainous trails.


  • The powerful motor on offer
  • Excellent suspension system
  • Easy to adjust the saddle
  • Removable battery system on offer

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Additional information

Specification: Powerfly FS 4 2021


Trek Bikes



SR Suntour XCR 34


SR Suntour Edge R


Alex MD35, Tubeless Ready, 32-hole, 35mm width, presta valve


14g Stainless Steel


Bontrager XR3 Comp

Rim strip

Bontrager TLR


Shimano Deore M4100, 10 speed

Rear derailleur

Shimano Deore M5120, long cage


FSA Bosch CK-220, 36T ring, 165mm length


Shimano Deore M4100, 11-46, 10 speed


KMC X10, 10 speed


VP-536 nylon platform


Bontrager Arvada, steel rails, 138mm width


TranzX JD-YSP18


Bontrager alloy, 31.8mm, 15mm rise, 720mm width


Bontrager XR Trail Comp, nylon lock-on


Bontrager alloy, 31.8mm, Blendr compatible


Tektro HD-M275 hydraulic disc

Brake rotors

Tektro, 6-bolt, 203mm




Bosch Purion

Max. Speed



M – 24.89 kg / 54.88 lbs (with tubes)

Weight limit

300 lbs


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