Trek Powerfly FS+ 6 Gen 4 2026 - Electric Mountain Bike
The Powerfly FS+ 6 Gen 4 is a capable full-suspension e-MTB that combines rugged comfort and Bosch assist for exploring off-road trails, forest paths and rolling hills with added power and trail-smoothing confidence.
Key Features
- Alpha Platinum Aluminium frame with 120mm travel and Boost 148 rear spacing
- Fox AWL Rail HD fork with 130mm travel and Rail 2.0 damper
- Fox Float Rhythm shock with 2-position damper, 120mm travel
- Shimano SLX/XT 12-speed drivetrain with wide-range 10-51T cassette
- Shimano 4-piston hydraulic disc brakes
- 29" Bontrager Line TLR wheels with 2.4" Gunnison Pro XR tyres
- Bontrager Line dropper post with 170mm travel
- Available with 0% APR finance
Drive Information
- Bosch Performance Line CX motor, 85Nm torque
- Bosch PowerTube 800 Wh integrated smart system battery
- Bosch Purion 200 controller and display
The Trek Powerfly FS+ 6 Gen 4 is built for riders who want to go beyond the usual loops and discover what lies over the next ridge. At its heart is the Bosch Performance Line CX motor, delivering 85Nm of torque for confident climbing and responsive assistance on technical trails. Paired with the 800Wh PowerTube battery, it gives you the range to explore longer and climb more without worrying about running out of steam.
The Alpha Platinum Aluminium frame is both sturdy and lightweight, designed around Trek’s proven trail geometry and fitted with 120mm of rear travel for control and comfort. The Fox AWL Rail HD fork brings 130mm of front travel, soaking up roots and rocky tracks with the control of an air spring and the adjustability of the Rail 2.0 damper.
The drivetrain is a reliable and trail-ready combination of Shimano XT and SLX 12-speed components, giving you smooth, responsive shifting with a massive gear range courtesy of the 10-51T cassette. Shimano 4-piston hydraulic brakes with large rotors provide controlled braking power even on steep and unpredictable descents.
For added trail performance, Bontrager Line TLR wheels are wrapped in 29x2.4" Gunnison Pro XR tyres, offering dependable grip and support over varied terrain. A Bontrager Line dropper post adds flexibility when descending or tackling technical features, while integrated mounts give you the option to add racks, mudguards and lights.
From quiet woodland trails to alpine climbs, the Powerfly FS+ 6 offers full-suspension comfort and Bosch-assisted power for riders who want to go further, higher, and have more fun off the beaten track. And if you’re looking to extend your range even more, it’s compatible with the Bosch PowerMore range extender—perfect for long days in the saddle.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered headtube, guided internal routing, 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 |
| Headset | FSA IS-2, 1-1/8" top, 1.5" bottom |
| Stem | Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length |
| Bars | Bontrager Comp, alloy, 31.8 mm, 40mm rise, 780 mm width |
| Front Brake | Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper // Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper |
| Rear Brake | Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper // Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper |
| Rear Mech | Shimano XT M8100, long cage |
| Shifters | Shimano SLX M7100, 12-speed |
| Speed | 12 |
| Rims | Bontrager Line TLR 30, Tubeless-Ready, 28-hole, Presta valve // Bontrager Line TLR 30, Tubeless-Ready, 32-hole, Presta valve |
| Front Hub | Shimano TC500 alloy, CentreLock, 110x15 mm thru axle |
| Rear Hub | Shimano TC500 alloy, CentreLock, 148x12 mm thru axle |
| Front Tyre | Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40" |
| Rear Tyre | Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40" |
| Seat Post | Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 31.6 mm, 450 mm length |
| Saddle | Bontrager Verse P3, steel rails |
| Chain | Shimano Deore M6100, 12-speed |
| Cassette | Shimano Deore M6100, 10-51, 12-speed |
| Pedals | VP-536 nylon platform |
| Battery Size (WH) | Bosch PowerTube 800 Wh, smart system |
| Motor | Bosch Performance Line CX, 20 mph / 32 km/h max assist |
| User Interface | Bosch Purion 200 |
Trek Powerfly+ FS Gen 4 Size Chart
| Size | Height cm | Height Feet / Inches | Inseam cm | Inseam Inches |
|---|---|---|---|---|
| S | 155 - 165 cm | 5'1" - 5'5" | 74 - 78 cm | 29" - 31" |
| M | 165 - 176 cm | 5'5" - 5'9" | 79 - 83 cm | 31" - 33" |
| L | 177 - 188 cm | 5'10" - 6'2" | 84 - 89 cm | 33" - 35" |
| XL | 188 - 195 cm | 6'2" - 6'5" | 89 - 91 cm | 35" - 36" |
What size frame do I need if I am between sizes? - read here
Trek Powerfly FS+ Gen 4 2025 Geometry Chart
| Size | S | M | L | XL |
|---|---|---|---|---|
| Stack | 597 | 629 | 647 | 666 |
| Reach | 425 | 450 | 475 | 500 |
| Head Tube Length | 130 | 110 | 130 | 150 |
| Head Tube Angle | 65.0° | 66.0° | 66.0° | 66.0° |
| Bottom Bracket Height | 330 | 335 | 335 | 335 |
| Bottom Bracket Drop | 30 | 45 | 45 | 45 |
| Trail | 123 | 125 | 125 | 125 |
| Fork Rake/Offset | 44 | 44 | 44 | 44 |
| Chainstay Length | 458 | 461 | 461 | 461 |
| Wheelbase | 1201 | 1223 | 1257 | 1290 |
| Top Tube Length (horizontal) | 563 | 595 | 630 | 654 |
| Standover Height | 756 | 780 | 775 | 778 |
| Seat Tube Length | 380 | 400 | 420 | 450 |
| Seat Tube Angle | 71.1° | 71.3° | 71.2° | 72.4° |
| Effective Seat Tube Angle | 77.0° | 77.0° | 77.0° | 77.0° |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycle as shipped, other geometry configurations may be available with certain bikes. Please contact us via Live Chat to find out more.
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Trek Powerfly FS+ 6 Gen 4 2026 - Electric Mountain Bike
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