Trek Powerfly FS+ 6 Gen 4 Electric Mountain Bike - Black

The Powerfly FS+ 6 is a full-power full suspension electric mountain bike built to explore beyond ...

Best current price£3,999.00from Team Cycles

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Team CyclesTrek Unisex Black Powerfly Fs+ 6 Gen 4 800Wh Full Suspension Electric Mountain Bike Gloss Dark Star And Matte Dark Web
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£3,999.00
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TredzTrek Gloss Dark Star/Matte Dark Web Powerfly Fs+ Gen 4 Size 6
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Evans Cycles UKTrek Powerfly Fs+ 6 Gen 4 2026 Electric Mountain Bike Medium Black
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£4,499.00
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Product Information

Full details

The Trek Powerfly FS+ 6 Gen 4 is designed for adventurous riders who want to tackle challenging off-road terrain with electric assistance. Its key benefit is the combination of full suspension comfort and a powerful Bosch motor, allowing for longer, more capable rides. A potential caveat is its robust build, which means it carries more weight than a non-electric bike. This e-MTB features an Alpha Platinum Aluminium frame, FOX suspension, a 12-speed Shimano drivetrain, and powerful hydraulic disc brakes, all powered by a Bosch Performance Line CX motor and an 800 Wh battery.

All features

Model Part Number5329734
BrandTrek

Extended Product Information

FAQs

What is the maximum assisted speed for the Bosch motor?

The Bosch Performance Line CX motor provides assistance up to 20 mph (32 km/h) in the US. In EU and APAC regions, the maximum assist speed is 25 km/h.

How do I charge the Bosch Power Tube battery?

The battery can be charged while on the bike or removed for charging off the bike using the provided Bosch charger. Ensure the charger is connected correctly to the battery and a power source.

What is the range of the 800 Wh battery?

Battery range varies significantly based on factors like terrain, rider weight, assist level, and pedaling effort. However, the 800 Wh battery is designed to provide substantial range for long rides.

Can I ride this bike in the rain?

Yes, the bike is designed to be ridden in various weather conditions. However, always clean and dry the bike thoroughly after riding in wet conditions, paying special attention to the drivetrain and electrical components.

What is the recommended rider height for each size?

Sizes available are S, M, L, XL. Rider height recommendations are: S (155-165 cm), M (165-176 cm), L (177-188 cm), XL (188-195 cm).

Are the tires tubeless-ready?

Yes, the Bontrager Gunnison Pro XR tires and Bontrager Line TLR 30 rims are Tubeless Ready. Tubeless setup requires sealant and compatible valves.

What kind of maintenance does the full suspension require?

Regular cleaning of fork stanchions and shock body is recommended. Following the manufacturer's (Fox) service schedule for lower leg services and damper services is crucial for optimal performance and longevity.

Troubleshooting

E-bike system not powering on

Ensure the battery is fully charged and correctly inserted. Check that the display unit and battery are securely connected. Refer to the Bosch system manual for detailed troubleshooting steps.

Motor cuts out during ride

Check battery charge level. Ensure no error codes are displayed on the controller. Verify all connections between battery, motor, and display are secure. Overheating can also cause temporary shutoffs; allow the system to cool.

Poor shifting performance

Inspect the derailleur hanger for bends. Check cable tension and adjust the rear derailleur as needed. Clean and lubricate the chain and cassette. Ensure the chain is not worn.

Brakes feel spongy or weak

The hydraulic brake system may need bleeding. Check brake pad wear and rotor condition. Ensure brake levers are properly adjusted. Consult a qualified bike mechanic if issues persist.

Suspension feels harsh or bottoms out easily

Check suspension pressure (air forks/shocks) and adjust to rider weight. Ensure rebound and compression settings are appropriate for the terrain. Inspect for any leaks or damage to the suspension components.

Pros and Cons

Pros

  • Powerful Bosch motor for excellent climbing and extended range.
  • Full suspension smooths out rough terrain for increased comfort and control.
  • High-capacity 800 Wh battery offers long ride potential.
  • Quality Shimano XT/SLX drivetrain provides reliable and precise shifting.
  • Strong 4-piston hydraulic brakes ensure confident stopping power.

Cons

  • Heavier than a traditional mountain bike due to motor and battery.
  • Full suspension adds complexity and maintenance requirements.
  • E-bike specific components may require specialized tools for service.
  • 20 mph (32 km/h) assist limit may be restrictive for some riders in specific regions.

Setup, Compatibility & Care

Initial Setup:

  1. Unpacking: Carefully remove the bike from its packaging, checking for any shipping damage.
  2. Install Components: Attach the handlebars to the stem, and install pedals (note: pedals are often sold separately).
  3. Battery Installation: Ensure the Bosch Power Tube battery is securely inserted into its frame mount and locked.
  4. Tire Inflation: Inflate tires to the recommended pressure indicated on the sidewall.
  5. Pre-Ride Check: Perform a thorough check of brakes, shifting, tire pressure, and bolts before your first ride.

Compatibility:

  • Drive System: Features a Bosch Performance Line CX motor and is compatible with Bosch Smart System accessories and chargers.
  • Drivetrain: Uses a standard 12-speed Shimano chain and cassette system.
  • Wheels: Bontrager Line TLR 30 wheels are Tubeless Ready, requiring sealant and appropriate valves for tubeless setup.
  • Seatpost: Compatible with 31.6 mm seatposts, including the integrated dropper.
  • UDH: Utilizes a Universal Derailleur Hanger for easy replacement.

Care and Maintenance:

  • Cleaning: Clean the bike after muddy rides using a soft brush and mild soap with water. Avoid high-pressure washers, especially near the motor and electrical components.
  • Battery Care: Store the battery in a cool, dry place. Avoid full discharge; charge it to around 50-60% for long-term storage. Refer to the Bosch manual for detailed battery care.
  • Drivetrain: Keep the chain clean and lubricated. Regularly check for wear on the chain, cassette, and chainring.
  • Brakes: Inspect brake pads for wear and clean rotors periodically. Ensure hydraulic systems are free of leaks.
  • Suspension: Follow Fox's recommended service intervals for the fork and shock for optimal performance and longevity.

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