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It's right for you if...
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 lightweight Alpha Platinum Aluminium frame with adjustable horizontal sliding dropouts, suspension-corrected OCLV Carbon Bontrager Haru Pro fork and FSA headset. The rear thru axle dropout is 197 mm, the fork thru axle dropout is 15x150 mm. Built to accommodate 26x5˝ or 27.5x4˝ wheels.
The final word
High-value fun in any season. Farley AL is fast, fun and capable, and you're getting a great jump start on your build with an included Bontrager carbon fork.
favorite_borderWhy you'll love it
- If you were under the impression that fat bikes were sluggish, this bike will change your mind
- 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
Features
27.5˝ fat tyres
More efficient 27.5" fat tyres keep you rolling faster, especially on groomed or packed snow.
Rack mounts
Going for a long ride? Rack mounts make carrying accessories a breeze.
Horizontal Sliding Dropout
Horizontal sliding dropout provides the ability to dial in the geometry to match each rider's style and allows for no-slip singlespeed conversions (chain tensioner required).
Learn more
Dropper post internal routing
Not ready for an internally routed dropper post now, but want to keep your options open? Select frames are equipped with the proper entry and exit points to accommodate internal routing for a Stealth seat post.
Alpha Platinum Aluminium
Our premium lightweight aluminium is continuously cold extruded and butted at multiple points, and hydroformed into sophisticated tube shapes for maximum strength and minimum weight.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Alpha Platinum Aluminium, tapered head tube, internal derailleur & dropper post routing, rack mounts, 197x12 mm adjustable horizontal sliding dropouts |
|---|---|
| Fork | Bontrager Haru, tapered alloy steerer, OCLV Carbon lowers, 490 mm axle-to-crown, 15x150 mm thru axle |
| Max compatible fork travel | 100mm (513mm axle-to-crown) |
| Skewer front | Bontrager 150x15 mm thru axle, 198 mm length |
|---|---|
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| Max tyre size | 27.5x4.50" or 26x4.70" |
| Max. chainring size | 1x: 32T, 2x: 22/36 |
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| Head set | FSA IS-2, 1-1/8" top, 1.5" bottom |
|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
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Sizing & Tech
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
Rider Height
Inseam
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 175.0 cm
5'3.4" - 5'8.9"
76.0 - 82.0 cm
29.9" - 32.3"
L
174.0 - 188.0 cm
5'8.5" - 6'2.0"
82.0 - 88.0 cm
32.3" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
2XL
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise stated.
| Frame size number | Frame size letter | Wheel size | A — Seat tube | B — Seat tube angle | Effective seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | F — Bottom bracket height | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.5" | S | 27.5" | 39.4 | 71.5° | 73.0° | 10.0 | 69.0° | 56.7 | 31.3 | 6.7 | 45.5 | 5.1 | 9.4 | 109.2 | 72.9 | 38.3 | 60.1 |
| 17.5" | M | 27.5" | 41.9 | 71.5° | 73.0° | 10.0 | 69.0° | 59.4 | 31.3 | 6.7 | 45.5 | 5.1 | 9.4 | 111.9 | 73.9 | 41.0 | 60.1 |
| 19.5" | L | 27.5" | 47.0 | 71.5° | 73.0° | 12.0 | 69.0° | 63.1 | 32.1 | 6.7 | 45.5 | 5.1 | 9.4 | 115.8 | 78.6 | 44.1 | 61.9 |
| 21.5" | XL | 27.5" | 52.1 | 71.5° | 73.0° | 12.0 | 69.0° | 64.4 | 32.1 | 6.7 | 45.5 | 5.1 | 9.4 | 117.1 | 81.7 | 45.4 | 61.9 |