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MSRP | $770 | $800 | $1,400 | $1,920 | $3,000 | $5,000 | $7,000 |
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Where to Buy | — $1 At | — $1 At | — $1 At | — $1 At | — $1 At | — $1 At | — $1 At |
Category | Fat | Fat | Fat | Fat | Fat | Fat | Fat |
| Aluminum | Aluminum | Aluminum | Aluminum | Carbon | Carbon | Carbon | |
Fork | Aluminum | Aluminum | Aluminum | Carbon | Carbon | Carbon | Carbon |
Wheels | Aluminum | Aluminum | Aluminum | Aluminum | Aluminum | Carbon | Carbon |
Wheel Size | 20″ | 24″ | 26″ | 26″ | 26″ | 26″ | 26″ |
Brakes | Mechanical Disc | Mechanical Disc | Mechanical Disc | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc |
Groupset | X4, SRAM | X4, SRAM | GX, X7 | NX, Race Face | GX Eagle, Race Face | X01, Race Face | XX1, Race Face |
Drivetrain | 1 × 9 | 1 × 9 | 1 × 10 | 1 × 11 | 1 × 12 | 1 × 11 | 1 × 11 |
Brand Site |
Based on frame geometry and build specs.
A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.
(climbing)
15 mph
Fatboy 20
18 mph
Fatboy 24
20 mph
Fatboy SE
21 mph
Fatboy
23 mph
Fatboy Comp Carbon
22 mph
Fatboy Expert Carbon
22 mph
S-Works Fatboy
(descending)
Frame | Fully butted Specialized A1 Premium Aluminum, ZeroStack head tube, 100mm-wide threaded bottom bracket, 170mm rear hub spacing BB Standard: BSA, 100mm, Threaded | Fully butted Specialized A1 Premium Aluminum, ZeroStack head tube, 100mm-wide threaded bottom bracket, 170mm rear hub spacing BB Standard: BSA, 100mm, Threaded | Specialized M4 Aluminum, fully butted tubing w/Smooth Welds, tapered head tube, post mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger BB Standard: BSA, 100mm, Threaded | Specialized M5 Aluminum, fully butted w/Smooth Welds, tapered head tube and seat tube, forged post mount 160mm disc dropouts, internal routing, forged bottom bracket shell, 197x12mm thru-axle rear BB Standard: BSA, 100mm, Threaded | Specialized FACT 10m, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs BB Standard: BSA, 100mm, Threaded | FACT 10m, full carbon frame, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs BB Standard: BSA, 100mm, Threaded | FACT 10m, full carbon frame, 12x197mm thru-axle rear, internal cable routing, ISCG XC tabs BB Standard: BSA, 100mm, Threaded |
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Fork | Specialized A1 Premium Aluminum, 1-1/8" alloy steerer | Specialized A1 Premium Aluminum, 1-1/8" alloy steerer | Specialized, alloy, air-formed legs, tapered alloy steerer, 135mm hub spacing, open quick-release dropouts | Specialized FACT carbon, 46mm offset, tapered steerer, 150mm axle | Specialized FACT carbon, tapered steerer, 46mm offset, 150mm axle | Carbon, 46mm offset, tapered steerer, 150mm axle spacing | Carbon, 46mm offset, tapered steerer, 150mm axle spacing |
Bottom Bracket | Square taper, 100x151.5mm, sealed bearings | Square taper, 100x151.5mm, sealed bearings | PF30 BB, 100mm | Threaded BSA | PF30 | PF30 | PF30 |
Stem | Alloy, 7-degree rise, 31.8mm clamp | Alloy, 7-degree rise, 31.8mm clamp | Ahead 3D-forged alloy, 31.8mm clamp, 6-degree rise | Specialized Alloy, 3D forged, 4-bolt, 6-degree | Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise | Specialized XC, 3D-forged alloy, 4-bolt, 6-degree rise | Syntace F109, 6-degree rise, 31.8mm clamp |
Handlebar | Specialized, alloy, 9-degree backsweep, 4-degree upsweep, 680mm width, 31.8mm | Specialized, alloy, 9-degree backsweep, 4-degree upsweep, 680mm width, 31.8mm | Double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm | Stout Pro Riser, double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm | Stout XC, double-butted alloy, 8-degree backsweep, 6-degree upsweep, 10mm rise, 31.8mm | Specialized Mini-rise, 7050 alloy, 8-backsweep, 6-upsweep, 10mm rise, 750mm width, 31.8mm clamp | Specialized Trail, FACT carbon, 6-degree upsweep, 8-degree backsweep, 27mm rise, 750mm width, 31.8mm |
Saddle | Specialized Youth, steel rails | Specialized Youth, steel rails | Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm | Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm | Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm | Phenom Expert, Adaptive Edge design, hollow titanium rails, 143mm | Body Geometry Phenom Expert, hollow titanium rails, 143mm |
Seatpost | Alloy, single-bolt, 27.2mm Type: Rigid | Alloy, single-bolt, 27.2mm Type: Rigid | Alloy, 12mm offset, 2-bolt clamp, 30.9mm Type: Rigid | Specialized 2-bolt head, forged alloy, 8mm offset, micro-adjust, 30.9mm Type: Rigid | Alloy, 2-bolt clamp, 12.5mm offset, 30.9mm, anti-corrosion hardware Type: Rigid | Race Face Next SL, 0mm offset, 30.9mm Type: Rigid | Race Face Next SL, 0mm offset, 30.9mm Type: Rigid |
Pedals | Platform | Platform | Specialized Platform, Cr-Mo, 9/16" spindle | Specialized Dirt | Specialized Platform, Cr-Mo, 9/16" spindle | Specialized Dirt Pedals | Specialized Dirt Pedals |
Grips | Specialized Body Geometry XCT, lock-on | Specialized Body Geometry XCT, lock-on | Specialized MTB Grip, lock-on | Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness | Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness | Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness | Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness |
Rear Derailleur | SRAM X4, long cage, 6-/7-/8-speed | SRAM X4, long cage, 9-speed | SRAM GX, Type 2.1, long cage, 10-speed | SRAM NX, long cage, 11-speed | SRAM GX Eagle, 12-speed | SRAM X01, carbon cage, 11-speed | SRAM XX1 Type 2.1, 11-speed |
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Crank | 9-speed, 28T chainring w/ chainguard | 9-speed, 28T chainring w/ chainguard | Stout direct mount, PF30, 28t, 28T, steel | Raceface Aeffect crank, BSA, Steel, 30T | Race Face Next R crank, Steel, 30T | Race Face Next SL, 28T | Race Face Next SL, 28T |
Shifters | SRAM, trigger, 9-speed | SRAM, trigger, 9-speed | SRAM X7, trigger | SRAM NX, trigger, 11-speed | SRAM GX Eagle, trigger, 12-speed | SRAM X01, trigger, 11-speed, | SRAM XX1, trigger, 11-speed |
Cassette | Sunrace, 9-Speed, 11-36t | Sunrace, 9-Speed, 11-36t | Sunrace, 10-speed, 11-42t | SRAM NX, 11-speed, 11-42t | SRAM GX Eagle, 12-speed, 10-50t | SRAM XG-1180, 11-speed, 10-42t | SRAM XX1, 11-speed, 10-42t |
Chain | KMC X9, 9-speed w/ reusable MissingLink™ | KMC X9, 9-speed w/ reusable MissingLink™ | KMC X10, 10-speed w/ Missing Link™ | KMC X11, 11-speed, anti-corrosion coating, w/ MissingLink™ | SRAM GX Eagle, 12-speed w/ PowerLock® | SRAM XX1, 11-speed | SRAM XX1, 11-speed |
Brakes | Front: Tektro Aries, mechanical disc, organic pads, 160mm rotor, Rear: Tektro Aries, mechanical disc, organic pads, 160mm rotor Type: Hydraulic Disc | Front: Tektro Aries, mechanical disc, organic pads, 160mm rotor, Rear: Tektro Aries, mechanical disc, organic pads, 160mm rotor Type: Hydraulic Disc | Front: Tektro Aries, mechanical disc, organic pad, 203/180mm rotor, Rear: Tektro Aries, mechanical disc, organic pad, 180/160mm rotor Type: Hydraulic Disc | Front: SRAM Level T hydraulic disc, organic pads, 200/180mm rotors, Rear: SRAM Level T hydraulic disc, organic pads, 180/160mm rotors Type: Hydraulic Disc | Front: SRAM Level TL hydraulic disc, organic pads, 200/180mm rotors, Rear: SRAM Level TL hydraulic disc, organic pads, 180/160mm rotors Type: Hydraulic Disc | Front: SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor, Rear: SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor Type: Hydraulic Disc | Front: SRAM Guide RS carbon, hydraulic disc, organic pads, carbon lever, Guide S4 4-piston caliper, 200/180mm rotor, Rear: SRAM Guide RS carbon, hydraulic disc, organic pads, carbon lever lever, Guide S4 4-piston caliper, 180/160mm rotor Type: Hydraulic Disc |
Rims | 20" disc, alloy construction, 68mm internal width, 32h | 24" disc, alloy construction, 68mm internal width, 32h | Stout XC 80, 26", 76mm internal width, 32h, tubeless ready | Stout XC 80, 26", 76mm internal width, 32h, tubeless ready | Stout XC 80, 26", alloy, 76mm internal width, disc-specific | HED Big Deal, carbon fiber construction, single wall, tubeless-ready, 26" x 85mm-wide, 32h | HED Big Deal, carbon fiber construction, single wall, tubeless-ready, 26" x 85mm-wide, 32h |
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Spokes | Stainless, 14g | Stainless, 14g | Stainless, 14g | Stainless, 14g | Stainless, 14g | Stainless, butted, 2.0/1.8/2.0mm, black | DT Swiss Revolution |
Front Hub | Stout 135, loose ball bearings, 10x135 QR, 32h | Stout 135, loose ball bearings, 10x135 QR, 32h | Stout 135, loose ball bearings, 10x135 QR, 32h | Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x1150mm, 32h | Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x150mm, 32h | Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x1150mm, 32h | DT Swiss Big Ride 350, 6-bolt, 15x150mm thru-axle, 32h |
Rear Hub | Stout 170, loose ball bearings, 9-/10-speed cassette body, 10x170mm QR, 32h | Stout 170, loose ball bearings, 9-/10-speed cassette body, 10x170mm QR, 32h | Stout 190, sealed cartridge bearings, 10x190mm QR, 32h | Sealed cartridge bearings, 6-bolt disc, 19x197mm axle, 10-speed alloy freehub, 32h | Stout Pro 197, sealed cartridge bearings, 6-bolt disc, 12x197mm, SRAM XD driver body, 32h | Stout XC Pro, disc alloy, SRAM XD driver body, sealed cartridge bearings, 12x197mm thru-axle, 32h | DT Swiss Big Ride 350, 6-bolt disc, 12x197mm thru-axle, SRAM XD driver, 32h |
Tires | Front: Ground Control Fat, 60 TPI, wire bead, 20x4.0", Rear: Ground Control Fat, 60 TPI, wire bead, 20x4.0" | Front: Ground Control Fat, 60 TPI, wire bead, 24x4.0", Rear: Ground Control Fat, 60 TPI, wire bead, 24x4.0" | Front: Ground Control Fat, 60 TPI, wire bead, 26x4.6", Rear: Ground Control Fat, 60 TPI, wire bead, 24x4.6" | Front: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 26x4.6", Rear: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 26x4.6" | Front: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0", Rear: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0" | Front: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0", Rear: Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.0" | Front: Fast Trak, Control Casing, 120 TPI, 2Bliss Ready, folding bead, 26x4.0", Rear: Fast Trak, Control Casing, 120 TPI, 2Bliss Ready, folding bead, 26x4.0" |