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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 Stranglehold dropouts, a Bontrager Haru Pro rigid carbon fork with a carbon steerer, a SRAM GX Eagle 1x12 drive train 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 tyres. 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 the 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 27.5 x 4.5˝ tyres 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
Features
27.5˝ fat tyres
More efficient 27.5" fat tyres keep you rolling faster, especially on groomed or packed snow.
Trek's mountain-specific carbon fibre is tougher carbon, with unique materials and lay-up procedures, Trek's advanced engineering, and a higher standard of testing.
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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 and tyres
Tubeless Ready rims and tyres 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.
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Horizontal Sliding Dropout
The horizontal sliding dropout with redundant securing mechanisms allows for no-slip single-speed or geared options and provides the ability to dial in the geometry to match each rider’s style.
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Specifications
*spec applies to all sizes unless otherwise noted
| Frame | OCLV Mountain Carbon, tapered head tube, internal derailleur & dropper post routing, 197x12 mm adjustable horizontal sliding dropouts |
|---|---|
| Fork | Bontrager Haru Pro, tapered carbon steerer, OCLV Carbon lowers, 490 mm axle-to-crown, 15x150 mm thru axle |
| Max compatible fork travel | 100mm |
| Wheel front | Trek Wampa Carbon 80 SL, Tubeless Ready, 6-bolt, 150x15 mm thru axle |
|---|---|
| Wheel rear | Trek Wampa Carbon 80 SL, Tubeless Ready, 108T Rapid Drive, 6-bolt, SRAM XD driver, 197x12 mm thru axle |
| Hub front | Bontrager alloy, sealed bearing, 6-bolt disc, 150x15 mm thru axle |
| Skewer front | Bontrager Switch thru axle, removable lever |
| Hub rear | Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, 197x12 mm thru-axle |
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| Tyre | Bontrager Barbegazi Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x4.50" |
| Max tyre 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, 30-T alloy FAT 5 ring, 170 mm length |
|
Size:
M, L, XL Truvativ Stylo Carbon Eagle, DUB, 30-T alloy FAT 5 ring, 175 mm length |
|
| Bottom bracket | SRAM DUB, 121 mm, 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, 138 mm width |
|---|---|
| *Seatpost |
Size:
S Bontrager Line Dropper, 100 mm travel, internal routing, 31.6 mm, 345 mm length |
|
Size:
M, L, XL Bontrager Line Dropper, 125mm travel, internal routing, 31.6 mm, 395mm length |
|
| Handlebar | Bontrager Race X Lite, OCLV Carbon, 31.8 mm, 5 mm rise, 720 mm width |
| Grips | ESI Chunky |
| *Stem |
Size:
S Bontrager Pro, 31.8 mm, 7-degree, Blendr compatible, 70 mm length |
|
Size:
M Bontrager Pro, 31.8 mm, 7-degree, Blendr compatible, 80 mm length |
|
|
Size:
L, XL Bontrager Pro, 31.8 mm, 7-degree, Blendr compatible, 90 mm length |
|
| Head set | FSA IS-2, 1-1/8" top, 1.5" bottom |
| Brake | SRAM Guide RS hydraulic disc |
| Brake rotor | SRAM CenterLine, 6-bolt, round-edge, 160 mm |
| Weight | M - 12.14 kg / 26.76 lb (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
Sizing & fit
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 | 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 |