Trek Powerfly FS+ 4 Electric Mountain Bike - Orange

The Powerfly FS+ 4 is a full-power full suspension electric mountain bike for taking on alpine adv...

Best current price£3,500.00from Evans Cycles UK

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Evans Cycles UKTrek Powerfly Fs+ 4 2025 Electric Mountain Bike Medium Orange
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Team CyclesTrek Unisex Grey Powerfly Fs+ 4 Gen 5 600Wh Full Suspension Electric Mountain Bike Mercury And Dark Web
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TredzTrek Mercury/Dark Web Powerfly Fs+ Gen Size 4
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Product Information

Full details

The Trek Powerfly FS+ 4 is a full-suspension electric mountain bike built for riders seeking powerful assistance on challenging alpine terrain. Its key benefit lies in its robust full-suspension design and the strong Bosch Performance Line CX motor, enabling confident descents and effortless climbs. A potential caveat is the standard battery's range, which may require consideration for very long excursions. Key features include an Alpha Platinum Aluminium frame, 130mm front and 120mm rear suspension, and a customizable Bosch motor system with options for battery upgrades.

All features

Model Part Number5329712
BrandTrek

Extended Product Information

FAQs

What is the range of the standard 600 Wh battery?

The range varies significantly based on terrain, rider weight, assist level, and other factors. Bosch estimates typically range from 30-100 miles (50-160 km) for a 600 Wh battery under optimal conditions. Use the Bosch range calculator in the eBike Flow app for a more personalized estimate.

Can I upgrade the battery to a larger size?

Yes, the 600 Wh battery can be upgraded to an 800 Wh option. This upgrade should be performed by an authorized dealer.

How do I customize the motor settings?

You can customize the motor's performance settings, such as increasing torque and peak power, using the Bosch e-Bike Flow app connected to your bike.

What is the travel on the front and rear suspension?

The RockShox Recon Silver RL fork provides 130 mm of travel, and the rear suspension offers 120 mm of travel.

Is the bike compatible with tubeless tires?

Yes, the Bontrager Line TLR 30 rims are Tubeless-Ready (TLR), and the Bontrager Gunnison Pro XR tires are also Tubeless Ready. You will need tubeless rim tape, valves, and sealant to convert.

How do I remove the integrated battery?

The RIB 2.0 battery is designed to be easily removed. Typically, this involves unlocking a mechanism with a key and then sliding the battery out of the downtube.

What is the maximum rider weight capacity?

The total system weight limit (rider + bike + cargo) for Trek e-bikes is generally 300 lbs (136 kg). Always check the specific product manual or consult your dealer for precise weight limits.

Troubleshooting

Motor not providing assistance

Check that the battery is properly installed and charged. Ensure the system is turned on and the speed sensor is clean and aligned. If the issue persists, consult the Bosch eBike Flow app for error codes or contact a dealer.

Battery not charging

Ensure the charger is correctly connected to both the battery and a working power outlet. Check the battery contacts for dirt or damage. Try a different outlet. If the problem continues, the battery or charger may need service.

Suspension feels harsh or unresponsive

Verify that the suspension is set to the correct air pressure for your weight. Check for any obstructions or damage to the fork stanchions or rear shock. Ensure the lockout feature is disengaged.

Gears skipping or not shifting smoothly

Inspect the rear derailleur for damage or misalignment. Check the gear cable for tension and smooth operation. Ensure the chain is clean and lubricated. Adjustments to the derailleur may be needed.

Brakes are weak or noisy

Check brake pad wear and replace if necessary. Ensure the brake rotors are clean and free from oil or debris. If the brakes feel spongy, they may need bleeding. Inspect for any leaks in the brake lines.

Pros and Cons

Pros

  • Powerful Bosch Performance Line CX motor for confident climbing.
  • Full suspension design (130mm front, 120mm rear) provides comfort and control on rough trails.
  • Option to upgrade battery size or add a range booster for extended rides.
  • Adjustable geometry via Mino Link for tailored handling.
  • Integrated battery system is secure and removable.
  • Reliable Shimano CUES drivetrain for low-maintenance shifting.

Cons

  • Standard 600 Wh battery may be insufficient for very long or remote rides without planning.
  • While upgradeable, initial battery capacity is a consideration for endurance riders.
  • Mechanical lockout on the fork might be less convenient than hydraulic options for some riders.
  • The bike's weight might be a factor on very technical sections or when lifting.

Setup, Compatibility & Care

Initial Setup: Before your first ride, ensure the battery is fully charged using the provided charger. Install any accessories like pedals and check that all bolts are securely tightened, especially on the stem, handlebars, and suspension components. Familiarize yourself with the Purion 200 remote and its functions. It is recommended to have a qualified bike mechanic perform a final safety check and adjust suspension settings to your weight and riding style.

Compatibility: The Powerfly FS+ 4 is compatible with Bosch e-bike accessories, including the Bosch PowerMore booster battery and larger 800 Wh PowerTube battery (retrofitting by a dealer is recommended for battery upgrades). The frame features mounts for racks and mudguards, increasing its versatility. It uses a standard UDH (Universal Derailleur Hanger), ensuring wide compatibility for replacement hangers.

Care and Maintenance:

  • Cleaning: Clean the bike regularly with mild soap and water. Avoid high-pressure washers, especially around the motor and battery housing, as this can force water into sensitive components. Use a soft cloth to dry the bike.
  • Battery Care: Store the battery in a cool, dry place. Avoid exposing it to extreme temperatures. For long-term storage, it's advisable to keep the battery at a charge level between 30-60%.
  • Drivetrain: Keep the chain clean and lubricated. Regularly inspect the drivetrain for wear and adjust as needed.
  • Brakes: Check brake pad wear and fluid levels periodically. Ensure hydraulic disc brakes are functioning correctly.
  • Suspension: Follow RockShox's recommended maintenance schedule for the Recon Silver RL fork. Keep stanchions clean to prevent seal damage.
  • Software Updates: Use the Bosch e-Bike Flow app to keep your motor system's firmware updated for optimal performance and new features.

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