Trek Farley 9

Name: Trek Farley 9
Brand: Trek

2025 MountainFat bike Manufacturer page

Last known price: $3,999

Prices shown first for United States
Suspension: Rigid
Wheels: 27.5″
Drivetrain: 1 × 12 30t / 11–50t
Gear range: 455%
Weight: 18.3 kg 40.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 155–166
MD 164–178
LG 175–189
XL 187–195

Components

19 of 22 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, tapered head tube, top tube bag mounts, strapless full frame bag mounts, downtube fender mount, lower downtube accessory mount, seat stay rear rack mounts, internal rear derailleur & dropper post routing, 100mm threaded BB, UDH, 197x12mm Not identified

Suspension

1 part

Fork

Farley carbon, tapered alloy steerer, crown rack mounts, lower leg cage mounts, 150x15mm thru axle Not identified

Drivetrain

6 parts

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

7 parts

Other components

1 part

Racks

Size: S, M, L, XL, Farley custom front rack, Lava gloss; Size: S, M, L, XL, Farley custom rear rack, Lava gloss Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 430mm

Stack 599mm

Wheelbase 1131mm

Head angle 68.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	400	430	460	495
Stackmm	589	599	613	626
Top tube lengthmm	565	598	633	672
Seat tube lengthmm	380	420	450	490
Head tube lengthmm	90	100	115	130
Head tube angle	68.5°	68.5°	68.5°	68.5°
Seat tube angle	74°	74°	74°	74°
Chainstay lengthmm	450	450	450	450
Wheelbasemm	1097	1131	1166	1207
Front centermm	655	689	724	764
Bottom bracket dropmm	65	65	65	65
Bottom bracket heightmm	290	290	290	290
Standover heightmm	730	740	760	780
Fork rakemm	42	42	42	43
Trailmm	107	107	107	107
Stack/reach ratio	1.47	1.39	1.33	1.27

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
Fork material: Carbon
Bicycle weight: 18.3 kg

40.3 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 16.5 in
Highest gear: 75.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 4.5″
Tire width: 4.5″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 27.5″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.3 km/h
Highest gear: 28.7 km/h

Total gear range 455%

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: 16.5–75.0 gear inches

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 2025 builds
Specification	This bicycle Trek Farley 9	Trek Farley 5	Trek Farley 7
Frame
Fork material	Carbon	Carbon	Not informed
Bicycle weight	18.3 kg	16.2 kg	17.05 kg
Suspension
Suspension configuration	Rigid	Rigid	Hardtail
Front travel	Not informed	Not informed	80 mm
Drivetrain
Rear sprockets	12	10	12
Largest sprocket	50	48	50
Lowest gear	16.5 in	17.2 in	16.5 in
Other specifications
Suspension	Rigid	Rigid	Hardtail
Fork spring	Not informed	Not informed	Air