S-Works Fatboy
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S-Works Fatboy

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S-Works Fatboy
Technical Specifications

What started as 'serious fun' has quickly become a serious change to what we want out of bike. The fat revolution is here, and with races becoming more and more prevalent, we knew that our much-heralded Fatboy could stand to go on a diet. Say hello to the S-Works Fatboy.

It features an immaculate, FACT 10m carbon fiber construction with internal cable routing to ensure that it's light, stiff, and ready for nasty elements. We then spec'd it with SRAM's venerable one-by groupset, XX1, for dependable shifting, and then kept the carbon train rolling with lightweight carbon wheels from HED.

Altogether, it's a revolution within the revolution, sparing no expense in delivering the ultimate in fat performance.

  • An immaculate FACT carbon fiber construction ensures that the frame is lightweight and plenty stiff in all the right places. Internal cable routing is also incorporated, ensuring that slush, sand, snow, or dirt will have no bearing on performance out on the trail.
  • A FACT carbon fiber fork provides tons of compliance and absorbs chatter, while simultaneously keeping the overall weight of the bike down.
  • HED Big Deal carbon wheels are light, fast, and 85mm-wide to make sure that you get all of the traction and floatation that fat bikes are known for, only without a weight penalty or having to make any sacrifices to climbing prowess.

Technical Specifications

CHAIN SRAM XX1, 11-speed
CRANKSET Race Face Next SL
SHIFT LEVERS SRAM XX1, trigger, 11-speed
CASSETTE SRAM XX1, 11-speed, 10-42t
REAR DERAILLEUR SRAM XX1 Type 2.1, 11-speed
FORK Carbon, 46mm offset, tapered steerer, 150mm axle spacing
FRONT HUB DT Swiss Big Ride 350, 6-bolt, 15x150mm thru-axle, 32h
REAR HUB DT Swiss Big Ride 350, 6-bolt disc, 12x197mm thru-axle, SRAM XD driver, 32h
INNER TUBES Standard, Presta valve
SPOKES DT Swiss Revolution
RIMS HED Big Deal, carbon fiber construction, single wall, tubeless-ready, 26" x 85mm-wide, 32h
FRONT TIRE Fast Trak, Control Casing, 120 TPI, 2Bliss Ready, folding bead, 26x4.0"
REAR TIRE Fast Trak, Control Casing, 120 TPI, 2Bliss Ready, folding bead, 26x4.0"
SADDLE Body Geometry Phenom Expert, hollow titanium rails, 143mm
SEATPOST Race Face Next SL, 0mm offset, 30.9mm
STEM Syntace F109, 6-degree rise, 31.8mm clamp
HANDLEBARS Specialized Trail, FACT carbon, 6-degree upsweep, 8-degree backsweep, 27mm rise, 750mm width, 31.8mm
GRIPS Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
FRONT BRAKE SRAM Guide RS carbon, hydraulic disc, organic pads, carbon lever, Guide S4 4-piston caliper, 200/180mm rotor
REAR BRAKE SRAM Guide RS carbon, hydraulic disc, organic pads, carbon lever lever, Guide S4 4-piston caliper, 180/160mm rotor
PEDALS Specialized Dirt Pedals
SEAT BINDER Alloy, 34.9mm
FRAME FACT 10m, full carbon frame, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs


Geometry Chart

Fatboy - Geometry

  S M L XL
Reach 395mm 420mm 437mm 458mm
Top Tube Length, Horizontal 579mm 604mm 626mm 651mm
Stack 602mm 602mm 617mm 632mm
Wheelbase 1088mm 1113mm 1135mm 1161mm
Chainstay Length 455mm 455mm 455mm 455mm
Front Center 640mm 665mm 687mm 713mm
BB Drop 60mm 60mm 60mm 60mm
BB Height 307mm 307mm 307mm 307mm
Seat Tube Angle 73° 73° 73° 73°
Head Tube Angle 70.5° 70.5° 70.5° 70.5°
Seat Tube Length 394mm 434mm 470mm 520mm
Head Tube Length 94mm 94mm 110mm 125mm
Bike Standover Height 738.5mm 752mm 778.3mm 807.5mm
Fork Rake/Offset 47mm 47mm 47mm 47mm
Fork Length, Full 496mm 496mm 496mm 496mm
Trail 80mm 80mm 80mm 80mm