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 ...The Powerfly FS+ 6 is a full-power full suspension electric mountain bike built to explore beyond the beaten track. Its Alpha Platinum Aluminium frame blends confident geometry with a FOX suspension package (120 mm rear, 130 mm front) to smooth out rough trails. It comes ready to roll with a 12-speed Shimano XT/SLX drivetrain and the serious stopping power of Shimano 4-piston M6100 hydraulic disc brakes. Specifications Frameset Frame: Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2. 0), tapered headtube, guided internal routing, Motor Armor, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, 34. 9 mm seat tube, ABP, UDH, rack and mudguard mounts, Boost 148, 120 mm travel Fork: Fox AWL Rail HD, Rail 2. 0 damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 180 mm direct mount, 130 mm travel Rear Shock: Fox Float Rhythm, 2-position damper, 210x50 mm Wheels Rims: Bontrager Line TLR 30, Tubeless-Ready, 28-hole, Presta valve Tyres: Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2. 40 Drivetrain Crankset: Ethirteen Espec Plus, 160 mm length Shifters: Shimano SLX M7100, 12-speed Rear Derailleur: Shimano XT M8100, long cage Chain: Shimano Deore M6100, 12-speed Cassette: Shimano Deore M6100, 10-51, 12-speed Components Handlebar: Bontrager Comp, alloy, 31. 8 mm, 40mm rise, 780 mm width Stem: Bontrager Comp, 31. 8 mm, Blendr compatible, 7-degree, 50 mm length Grips: Bontrager XR Trail Comp, nylon lock-on Brakes: Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper Saddle: Bontrager Verse P3, steel rails Seatpost: Bontrager Line Dropper, 170 mm travel, Max Flow, internal routing, 31. 6 mm E-System Motor: Bosch Performance Line CX, 20 mph / 32 km/h max assist (25 km/h max assist in EU and APAC) Battery: Bosch Power Tube 800 Wh, smart system Controller: Bosch Purion 200 Powerfly FS Sizing SMLXLRider Height (cm) 155 - 165165 - 176177 - 188188 - 195Inseam (cm) 74 - 7879 - 8
Trek Unisex Black Powerfly Fs+ 6 Gen 4 800Wh Full Suspension Electric Mountain Bike Gloss Dark Star And Matte Dark WebFree delivery in 1–3 days£3,999.00Visit shop →
Trek Unisex Black Powerfly Fs+ 6 Gen 4 800Wh Full Suspension Electric Mountain Bike Gloss Dark Star And Matte Dark WebFree delivery in 1–3 days£3,999.00Visit shop →
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Trek Unisex White Powerfly Fs+ 6 Gen 4 800Wh Full Suspension Electric Mountain Bike Era And Buff BeigeFree delivery in 1–3 days£4,500.00Visit shop →
TredzTrek Gloss Dark Star/Matte Dark Web Powerfly Fs+ Gen 4 Size 6
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Trek Powerfly Fs+ 6 Gen 4 2026 Electric Mountain Bike Medium White£4.99 delivery£5,000.00Visit shop →
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 Number
5329734
Brand
Trek
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.
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:
Unpacking: Carefully remove the bike from its packaging, checking for any shipping damage.
Install Components: Attach the handlebars to the stem, and install pedals (note: pedals are often sold separately).
Battery Installation: Ensure the Bosch Power Tube battery is securely inserted into its frame mount and locked.
Tire Inflation: Inflate tires to the recommended pressure indicated on the sidewall.
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.