More options
It's right for you if...
You don't like fat biking—you love it. You make the biggest investment in your fat bike because you have the best time riding it, and you're willing to shell out for the lightest, fastest, fat bike we make because you know there's a return in fun, speed, and adventure.
The tech you get
A lightweight OCLV Mountain Carbon frame with horizontal sliding dropouts, a Bontrager Haru Pro rigid carbon fork with a carbon steerer, a SRAM GX Eagle 1x12 drivetrain with an extra-wide gear range, SRAM Guide RS hydraulic disc brakes, and Tubeless Ready Bontrager Wampa carbon wheels with a 108-tooth Rapid Drive rear hub for instant engagement paired with 27.5x4.5˝ Bontrager Barbegazi TLR tires. Plus, a Bontrager Line dropper post and a carbon handlebar.
The final word
It's the lightest fat bike we make. A carbon frame, carbon wheels, carbon fork, and top-shelf SRAM drivetrain come together in Farley 9.8 to make a high-performance ride that won't be slowed by foul weather, deep snow, or gnarly terrain.
favorite_borderWhy you'll love it
- This is a fat bike made without compromise: it's the lightest, fastest model we make
- It's a four-season freedom machine that lets you ride outside all year long
- The 27.5x4.5˝ tires deliver more speed and traction than their 26˝ counterparts
- It's easy to set up tubeless—and when you do, you'll save weight and your ride will get even faster
"Why pick anything else?"
"It's fast, handles trails like a boss, and the power transfer when pushing the cranks is nothing but impressive. It's a wonderful combination of smooth and snappy that thrives on the roughest-looking rubble. "
Read more
"Wicked good fun! 4.5/5 stars"
"Farley is one of the best-performing fat bike options straight out of the box. Carbon everything and smart design makes for silly-light and surprisingly fast fun. "
Read more
"Carbon beauty meets singletrack beast"
"A lightweight, sharp-looking, well-equipped, easy-to-climb, year-round fat bike. It's stiff, stable, and ready to party. The ride quality is amazing. "
Read more
"Versatile snow tamer"
"A lightweight, dedicated snow machine with a ton of versatility that's ready to race right out of the box. "
Read moreYou might also like
Features
27.5˝ fat tires
More efficient 27.5" fat tires keep you rolling faster, especially on groomed or packed snow.
Trek's mountain-specific carbon fiber is tougher carbon, with unique materials and layup procedures, Trek's advanced engineering, and a higher standard of testing.
Learn more
Rapid Drive 108 rear hub
With 108 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.
Tubeless Ready wheels & tires
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. Just add TLR rim strips, valves, and sealant.
Learn more
Horizontal Sliding Dropout
Horizontal sliding dropout with redundant securing mechanisms allows for no-slip singlespeed or geared options and provides the ability to dial in the geometry to match each rider’s style.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon, tapered head tube, internal derailleur & dropper post routing, 197x12mm adjustable horizontal sliding dropouts |
|---|---|
| Fork | Bontrager Haru Pro, tapered carbon steerer, OCLV Carbon lowers, 490mm axle-to-crown, 15x150mm thru axle |
| Max compatible fork travel | 100mm |
| Front wheel | Trek Wampa Carbon 80 SL, Tubeless Ready, 6-bolt, 150x15mm thru axle |
|---|---|
| Rear wheel | Trek Wampa Carbon 80 SL, Tubeless Ready, 108T Rapid Drive, 6-bolt, SRAM XD driver, 197x12mm thru axle |
| Front hub | Bontrager alloy, sealed bearing, 6-bolt, 15x150mm thru axle |
| Tire | Bontrager Barbegazi Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x4.50'' |
| Max tire size | 27.5x4.50" or 26x4.70" |
| Shifter | SRAM GX Eagle, 12 speed |
|---|---|
| Rear derailleur | SRAM GX Eagle |
| *Crank |
Size:
S Truvativ Stylo Carbon Eagle, DUB, 30T alloy FAT 5 ring, 170mm length |
|
Size:
M, L, XL Truvativ Stylo Carbon Eagle, DUB, 30T alloy FAT 5 ring, 175mm length |
|
| Bottom bracket | SRAM DUB, 121mm, PressFit |
| Cassette | SRAM XG-1275 Eagle, 10-50, 12 speed |
| Chain | SRAM GX Eagle, 12 speed |
| Max chainring size | 1x: 32T; 2x: 22/36 |
| Saddle | Bontrager Montrose Elite, titanium rails, 138mm width |
|---|---|
| *Seatpost |
Size:
S Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length |
|
Size:
M, L, XL Bontrager Line Dropper, 125mm travel, internal routing, 31.6mm, 395mm length |
|
| Handlebar | Bontrager Race X Lite, OCLV Carbon, 31.8mm, 5mm rise, 720mm width |
| Grips | ESI Chunky |
| *Stem |
Size:
S Bontrager Pro, 31.8mm, 7 degree, Blendr compatible, 70mm length |
|
Size:
M Bontrager Pro, 31.8mm, 7 degree, Blendr compatible, 80mm length |
|
|
Size:
L, XL Bontrager Pro, 31.8mm, 7 degree, Blendr compatible, 90mm length |
|
| Headset | FSA IS-2, 1-1/8'' top, 1.5'' bottom |
| Brake | SRAM Guide RS 4-piston hydraulic disc |
| Brake rotor | SRAM CenterLine, 6-bolt, round-edge, 160mm |
| Weight | M - 12.14 kg / 26.76 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.
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 noted.
| Frame size number | Frame size letter | Wheel size | A — Seat tube | B — 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 in | S | 27.5" | 36.8 | 73.0° | 10.0 | 69.0° | 56.6 | 31.5 | 6.5 | 44.0 | 5.1 | 9.1 | 107.8 | 76.4 | 38.3 | 59.8 |
| 17.5 in | M | 27.5" | 41.9 | 73.0° | 10.0 | 69.0° | 59.3 | 31.5 | 6.5 | 44.0 | 5.1 | 9.1 | 110.5 | 75.0 | 41.0 | 59.8 |
| 19.5 in | L | 27.5" | 47.0 | 73.0° | 12.0 | 69.0° | 63.0 | 31.5 | 6.5 | 44.0 | 5.1 | 9.1 | 114.3 | 77.8 | 44.1 | 61.7 |
| 21.5 in | XL | 27.5" | 52.1 | 73.0° | 12.0 | 69.0° | 64.3 | 31.5 | 6.5 | 44.0 | 5.1 | 9.1 | 115.6 | 81.6 | 45.4 | 61.7 |