Trek Powerfly 4

Name: Trek Powerfly 4
Brand: Trek

2021 MountainTrail Electric bicycle Manufacturer page

Trek Powerfly 4, color Factory Orange / Lithium Grey

Last known price: $3,699

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″, 29″
Drivetrain: 1 × 10 36t / 11–46t
Gear range: 418%
Battery: 500 Wh
Weight: 23.67 kg 52.2 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 137–155
SM 153–166.5
MD 161–176
LG 173–188
XL 186–196

Components

24 of 26 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 Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle Not identified

Electric system

3 parts

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- Bosch
Cassette
- Shimano Deore CS-M4100-10 10 speeds
CS-M4100-10
Chain
- KMC X10 10 speeds
Crankset
- FSA 36t
CK-220
Rear derailleur
- Shimano Deore RD-M5120 11 speeds
RD-M5120
Shifters
- Shimano Deore SL-M4100 10 speeds
SL-M4100

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Formula
DC-511
Rear hub
- Bontrager
Rims
- Bontrager
Spokes

14g stainless steel Not identified
Tires
- Bontrager

Cockpit and contact points

7 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 404mm

Stack 640mm

Wheelbase 1159mm

Head angle 67.7°

Seat angle 71.5°

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

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	390	390	404	425	450
Stackmm	607	623	640	649	668
Top tube lengthmm	570	598	618	642	673
Seat tube lengthmm	363	394	419	470	521
Head tube lengthmm	130	130	130	140	160
Head tube angle	68.5°	67.6°	67.7°	67.6°	67.6°
Seat tube angle	73.5°	71.6°	71.5°	71.6°	71.6°
Chainstay lengthmm	455	455	455	455	455
Wheelbasemm	1099	1125	1159	1174	1206
Front centermm	652	674	708	723	755
Bottom bracket dropmm	65	49	48	49	49
Bottom bracket heightmm	291	307	325	325	325
Standover heightmm	707	729	796	817	820
Fork rakemm	42	43	55	46	45
Trailmm	95	101	107	107	107
Stack/reach ratio	1.56	1.60	1.58	1.53	1.48

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 23.67 kg

52.2 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 22.7 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 500 Wh

Additional specifications

Battery: Bosch PowerTube 500
Bottom bracket standard: Bosch
Fork spring: Coil
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

4 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

22.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

94.9 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.7 km/h
Highest gear: 36.4 km/h

Total gear range 418%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 22.7–94.9 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% 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 2021 builds
Specification	This bicycle Trek Powerfly 4	Trek Powerfly 4 625	Trek Powerfly 5	Trek Powerfly 7	Trek Powerfly FS 4	Trek Powerfly FS 4 500
Frame
Bicycle weight	23.67 kg	23.37 kg	23 kg	23.12 kg	24.89 kg	24.83 kg
Suspension
Suspension configuration	Hardtail	Hardtail	Hardtail	Hardtail	Full suspension	Full suspension
Rear travel	Not informed	Not informed	Not informed	Not informed	100 mm	100 mm
Drivetrain
Smallest chainring	36	36	34	34	36	36
Largest chainring	36	36	34	34	36	36
Rear sprockets	10	10	12	12	10	10
Smallest sprocket	11	11	11	10	11	11
Largest sprocket	46	46	50	51	46	46
Lowest gear	22.7 in	22.7 in	19.7 in	19.3 in	22.7 in	22.7 in
Highest gear	94.9 in	94.9 in	89.6 in	98.6 in	94.9 in	94.9 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Electric bicycle systems
Battery capacity	500 Wh	625 Wh	625 Wh	625 Wh	500 Wh	500 Wh
Other specifications
Bottom bracket standard	Bosch	Bosch	Not informed	Not informed	Bosch	Bosch
Fork spring	Coil	Coil	Air	Air	Air	Air
Suspension	Hardtail	Hardtail	Hardtail	Hardtail	Full suspension	Full suspension
Tire width	2.3″	2.3″	2.3″	2.4″	2.3″	2.3″
Tire clearance	Not informed	Maximum tire width: 2.6″	Maximum tire width: 2.6″	Maximum tire width: 2.6″	Maximum tire width: 2.4″	Maximum tire width: 2.4″

Changes since 2020
Specification	2020 Trek Powerfly 4	This bicycle Trek Powerfly 4
Frame
Bicycle weight	24.47 kg	23.67 kg
Drivetrain
Smallest chainring	15	36
Largest chainring	15	36
Rear sprockets	9	10
Largest sprocket	36	46
Lowest gear	12.1 in	22.7 in
Highest gear	39.6 in	94.9 in
Other specifications
Battery	Capacity: 500 WhBosch PowerTube, vertical, 500 wh	Capacity: 500 WhBosch PowerTube 500
Tire clearance	Maximum tire width: 2.6″	Not informed
Bottom bracket standard	Not informed	Bosch