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Trek Powerfly+ FS 8 Gen 4

Model year: 2026 MountainTrail Electric bicycle Manufacturer page (opens in a new tab)
Price
Not published
Europe
€6,499 Last known price
Travel
130 / 120 mm Fork / rear shock
Wheels
27.5″, 29″
Drivetrain
1 × 12 10–52t
Gear range
520%
Battery
800 Wh
Weight
24.48 kg 54.0 lb · Reference configuration not specified
Frame
Aluminum
Brakes
Hydraulic disc

Rider height by size (cm)

Size guide
  • 15.5" 155–166
  • 17.5" 164–178
  • 19.5" 176–189
  • 21.5" 187–195

Components

22 of 23 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part
  • Frame

    Alpha Platinum Aluminium, Removable Integrated Battery (RIB 2.0), tapered headtube, guided internal routing, Motor Armor, Mino Link adjustable geometry, adjustable leverage rate, 34.9 mm seat tube, ABP, UDH, rack and mudguard mounts, Boost 148, 120 mm travel Not identified

Electric system

4 parts
  • Battery
  • Charger
  • Display
  • Motor

Sizes and geometry

Size explorer

Enter your height to highlight matching ranges.

Size 17.5"

Table
Reach 450mm
Stack 629mm
Wheelbase 1223mm
Head angle 66.0°
Seat angle 77.0°
Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.
Size Reported by the manufacturer

Specifications

Frame and fork

Intended fit
  • Unisex
Frame material
  • Aluminum
Bicycle weight
  • 24.48 kg
  • 54.0 lb
Weight limit
  • 136 kg
  • 299.8 lb

Suspension

Suspension configuration
  • Full suspension
Front travel
  • 130 mm
Rear travel
  • 120 mm

Drivetrain

Derived by Bikelake
Front chainrings
  • 1
Rear sprockets
  • 12
Smallest sprocket
  • 10
Largest sprocket
  • 52

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

130 mm

This value is within the central range for this class.

Cohort
Mountain / Trail Model year: 2026
Sample
1,644 bicycles with this information
Coverage
96.3% of the class

Shifting

Electronic

389 of 1,706 bicycles with this information use electronic shifting.

Cohort
Mountain / Trail Model year: 2026
Sample
1,706 bicycles with this information
Coverage
100.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds

Differences across 2026 builds
Specification This bicycle Trek Powerfly+ FS 8 Gen 4 Trek Powerfly+ 4 800 Wh Gen 5 Trek Powerfly+ 4 Equipped 800 Wh Gen 5 Trek Powerfly+ 4 Equipped Gen 5 Trek Powerfly+ 4 Gen 5 Trek Powerfly+ 6 Gen 5
Frame
Bicycle weight 24.48 kg Not informed Not informed 25.7 kg 23.1 kg 24.4 kg
Suspension
Suspension configuration Full suspension Hardtail Hardtail Hardtail Hardtail Hardtail
Front travel 130 mm 100 mm 100 mm 100 mm 100 mm 100 mm
Rear travel 120 mm Not informed Not informed Not informed Not informed Not informed
Drivetrain
Rear sprockets 12 10 10 10 10 12
Smallest sprocket 10 11 11 11 11 10
Largest sprocket 52 48 48 48 48 51
Smallest chainring Not informed 36 36 36 36 Not informed
Largest chainring Not informed 36 36 36 36 Not informed
Lowest gear Not informed 21.8 in 20.6 in 21.8 in 21.8 in Not informed
Highest gear Not informed 94.9 in 90.0 in 94.9 in 94.9 in Not informed
Cockpit
Derailleur hanger UDH Not informed Not informed Not informed Not informed Not informed
Seatpost Dropper seatpost Rigid seatpost Rigid seatpost Rigid seatpost Rigid seatpost Dropper seatpost
Shifting Electronic Mechanical Mechanical Mechanical Mechanical Mechanical
Electric bicycle systems
Battery capacity 800 Wh 800 Wh 800 Wh 600 Wh 600 Wh 800 Wh
Other specifications
Suspension Full suspension Hardtail Hardtail Hardtail Hardtail Hardtail
Tire clearance Maximum tire width: 2.5″ Maximum tire width: 2.5″ Maximum tire width: 2.5″ Not informed Not informed Not informed
Tire width 2.4″ 2.4″ 2.4″ 2.4″ 2.4″ Not informed
Wheel size 27.5″ / 29″ 27.5″ / 29″ 27.5″ 27.5″ / 29″ 27.5″ / 29″ 27.5″ / 29″
Bottom bracket standard Not informed Bosch Bosch Bosch Bosch Not informed

No exact Powerfly+ FS 8 Gen 4 publication is available for 2025.

Other models in this family

10 models

Published versions from the same family and model year.

Trek Powerfly+ FS 8 Gen 4, by Trek

This bicycle

E-bike, Trail

Powerfly+ FS 8 Gen 4

  • Weight: 24.5 kg
  • Suspension: 130/120 mm
  • Wheel size: 27.5″/29″
Trek Powerfly+ 4 Equipped Gen 5, by Trek

E-bike, Cross-country

Powerfly+ 4 Equipped Gen 5

E-bike, Mountain / Cross-country

  • Weight: 25.7 kg
  • Suspension: 100 mm
  • Wheel size: 27.5″/29″
Trek Powerfly+ 4 Gen 5, by Trek

E-bike, Cross-country

Powerfly+ 4 Gen 5

E-bike, Mountain / Cross-country

  • Weight: 23.1 kg
  • Suspension: 100 mm
  • Wheel size: 27.5″/29″
Trek Powerfly+ 6 Gen 5, by Trek

E-bike, Cross-country

Powerfly+ 6 Gen 5

E-bike, Mountain / Cross-country

  • Weight: 24.4 kg
  • Suspension: 100 mm
  • Wheel size: 27.5″/29″
Trek Powerfly+ 8 Gen 5, by Trek

E-bike, Cross-country

Powerfly+ 8 Gen 5

E-bike, Mountain / Cross-country

  • Weight: 23.7 kg
  • Suspension: 100 mm
  • Wheel size: 27.5″/29″
Trek Powerfly+ FS 6 Gen 4, by Trek

E-bike, Trail

Powerfly+ FS 6 Gen 4

E-bike, Mountain / Trail

  • Weight: 25.1 kg
  • Suspension: 130/120 mm
  • Wheel size: 27.5″/29″

Similar bicycles

Same category, closest configuration.

Trek Powerfly FS+ 8 Gen 4, by Trek

Trek

Powerfly FS+ 8 Gen 4

Model year: 2026

Trek Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.5 kg
  • Suspension: 130/120 mm
  • Wheel size: 27.5″/29″
Moustache Samedi 27 Wide 5, by Moustache

Moustache

Samedi 27 Wide 5

Model year: 2026

Moustache Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.4 kg
  • Suspension: 130/120 mm
Trek Powerfly FS+ 4, by Trek

Trek

Powerfly FS+ 4

Model year: 2026

Trek Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.6 kg
  • Suspension: 130/120 mm
  • Wheel size: 27.5″/29″
Silverback S-Electro Elite AL 2, by Silverback

Silverback

S-Electro Elite AL 2

Model year: 2026

Silverback Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.6 kg
  • Suspension: 150/145 mm
  • Wheel size: 29″
Vitus E-Escarpe 290 VRS, by Vitus

Vitus

E-Escarpe 290 VRS

Model year: 2026

Vitus Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.3 kg
  • Suspension: 150/140 mm
  • Wheel size: 29″
KTM Macina Lycan 571 Glorious, by KTM

KTM

Macina Lycan 571 Glorious

Model year: 2026

KTM Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.7 kg
  • Suspension: 140 mm
  • Wheel size: 27.5″
Moustache Samedi 27 Wide 3, by Moustache

Moustache

Samedi 27 Wide 3

Model year: 2026

Moustache Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.7 kg
  • Suspension: 130/120 mm
KTM Macina Chacana 591, by KTM

KTM

Macina Chacana 591

Model year: 2026

KTM Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.9 kg
  • Suspension: 130/125 mm
  • Wheel size: 29″
Silverback S-Electro Elite AL 1, by Silverback

Silverback

S-Electro Elite AL 1

Model year: 2026

Silverback Model year: 2026

E-bike, Mountain / Trail

  • Weight: 24.0 kg
  • Suspension: 150/145 mm
  • Wheel size: 29″
R RAYMON Korak Ultra, by R RAYMON

R RAYMON

Korak Ultra

Model year: 2026

R RAYMON Model year: 2026

E-bike, Mountain / Trail

  • Weight: 25.0 kg
  • Suspension: 140 mm
  • Wheel size: 29″
Trek Powerfly FS+ 6 Gen 4, by Trek

Trek

Powerfly FS+ 6 Gen 4

Model year: 2026

Trek Model year: 2026

E-bike, Mountain / Trail

  • Weight: 25.1 kg
  • Suspension: 130/120 mm
  • Wheel size: 27.5″/29″
Superior eXF 8089 B, by Superior

Superior

eXF 8089 B

Model year: 2026

Superior Model year: 2026

E-bike, Mountain / Trail

  • Weight: 25.2 kg
  • Suspension: 160/140 mm
  • Wheel size: 29″
Commençal Meta Power TR Bosch Limited, by Commençal

Commençal

Meta Power TR Bosch Limited

Model year: 2026

Commençal Model year: 2026

E-bike, Mountain / Trail

  • Weight: 23.8 kg
  • Suspension: 160/140 mm
Centurion Numinis R2000, by Centurion

Centurion

Numinis R2000

Model year: 2026

Centurion Model year: 2026

E-bike, Mountain / Trail

  • Weight: 25.2 kg
  • Suspension: 150/140 mm
  • Wheel size: 29″
Kross Grist Boost 1.0, by Kross

Kross

Grist Boost 1.0

Model year: 2026

Kross Model year: 2026

E-bike, Mountain / Trail

  • Weight: 25.4 kg
  • Suspension: 140 mm
  • Wheel size: 29″