Farley Al F/S XL Mercury

Trek

Farley Al F/S XL Mercury

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Farley AL is a high-value platform for your fat bike build. This lightweight Alpha Platinum Aluminum fat bike frameset has the ride characteristics of a traditional trail bike, with all the monster truck capability that comes with fat bike tires. Plus, you get tons of mounts for adding accessories like racks, fenders, and gear cages.
  • All the mounts make it easy to add accessories and customize Farley for how you want to roam
  • Its 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" tires
  • The faster you ride a fat bike, the more fun it gets — and this bike is a lot of fun

Adventure-ready fork

Farleys 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 custom rack mount on the crown and thoughtfully positioned triple bottle bosses (64mm spacing) on the lower legs let you gear up without sacrificing handling. Protective rubber bumpers on the bottom of the fork legs keep Farley upright and manageable when the front wheel needs to come off.

Keep it clean

Internal routing helps to protect Farleys 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 customization options. Gummy bears? Extra layers? Camping gear? Haul it all.


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
Fork Farley carbon, tapered alloy steerer, crown rack mounts, lower leg cage mounts, 150x15mm thru axle
Skewer Front Bontrager Switch thru axle, removable lever
Skewer Rear Bontrager Switch thru axle, removable lever
Seat Collar Bolt-on, 36.4mm
Headset FSA IS-2, 1-1/8 top, 1.5 bottom

Geometry Chart

B B Drop 6.5
B B Height 32
Chainstay Length 45
Eff Seat Tube Angle 74.0°
Eff Top Tube 67.2
Frame Reach 49.5
Frame Size Letter XL
Frame Size Number 19.5"
Frame Stack 62.6
Head Angle 68.5°
Head Tube Length 13
Offset 4.2
Seat Tube 49
Seat Tube Angle 72.5°
Standover 78
Trail 10.7
Wheelbase 120.7
Wheel Size 27.5"

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