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Warrantied for life
Each Trek carries a simple promise. We'll take care of you and do what's right.
You're looking for a light, strong, alloy fat bike frame with a trail-optimised geometry for stability and responsiveness on any trail, in any season.
The tech you get
A rugged Alpha Platinum Aluminium frame with loads of mounts for the ultimate in customisation. A lightweight carbon fork that's ready to accept our customised front rack or gear cages. Rear thru axle dropout is 12x197 mm and fork thru axle dropout is 15x150 mm. Built to accommodate 26x5" or 27.5x4" wheels.
The final word
High-value fun in any season. The Farley AL is fast, fun and capable. Plus, you'll be getting a great jump-start on your build with an included carbon fork.
The Walkthrough
Why you'll love it
All the mounts make it easy to add accessories and customise Farley for how you want to roam
It's a four-season freedom machine that lets you ride outside all-year long
You can run your choice of wheels with 26x5" or 27.5x4" tyres
The faster you ride a fat bike, the more fun it gets – and this bike is a lot of fun
Time to get out the repair stand for some maintenance? Find a detailed breakdown of your bike with part numbers, torque values and platform-specific tech instructions below.
Farley's new, short-offset OCLV carbon fork puts you in an optimal position over the front wheel, upping traction over sketchy terrain while allowing for a shorter stem. A customised rack mount on the crown and thoughtfully positioned triple bottle bosses (64 mm spacing) on the lower legs let you gear up without sacrificing handling. Protective rubber bumpers on the bottom of the fork legs keep the Farley upright and manageable when the front wheel needs to come off.
Keep it clean
Internal routing helps to protect Farley's components from the elements and makes it easy to mount gear
Haul of the wild
Mounts all over the frame let you carry a wide variety of gear with endless customisation options. Gummy bears? Extra layers? Camping gear? Haul it all.
Trail-ready gear
Deck out your Farley Alloy with our favourite compatible accessories
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
1of0
*Please note – spec applies to all sizes unless listed separately
Frame
Alpha Platinum Aluminium, tapered head tube, top tube bag mounts, strapless full frame bag mounts, downtube mudguard mount, lower downtube accessory mount, seat stay rear rack mounts, internal rear derailleur and dropper post routing, threaded BB, UDH, 197x12 mm
This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. The prices shown are the manufacturer's suggested retail prices.
Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
How tall are you?
To measure your height, stand up straight, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.
What is your inside leg?
How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inside leg measurement. Your inside leg is very important to your final bike size so please measure carefully.
size-table
Size
Rider Height
Inseam
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"
All measurements provided in cm unless otherwise stated.
Trek Armor Farley 2023 Chainstay Guard, Bolt on and zip tie attachment, Required for routing rear derailleur cable housing, black. Due to a running change, compare OE part numbers when replacing.
Trek Cable Management Farley 2023 Bottom Bracket Cable Exit Guide, Fastens rear brake hose and shift housing exiting underside of downtube, requires two M5x0.8x16mm socket head cap screws, Black
Item type
Cable housing part
Description
Trek Cable Management, foam tube to cover housing and reduce noise, 450mm length, 9mm OD, 6mm ID, fits one line of housing only, cut 600mm replacement foam tube to fit
FSA Headset IS-2 Black, 47mm OD top bearing cover with 6.7mm stack height, 1-1/8'' standard top bearing, 1.5'' standard lower bearing, alloy crown race & compression ring
