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Specialized Fuse Comp 6FATTIE '16


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Product Details

Specialized Fuse Comp 6Fattie

Rolling on super wide 27.5 x 3 inch tyres, Specialized call the Fuse Comp 6Fattie their 27.5-plus bike.

Thanks to its traction-hungry plus-sized tyres, the Fuse Comp will romp over terrain in situations where skinnier treads might slither. Thanks to the tyres' volume, this hardtail emulates the downhill cushioning of a full suspension bike - without the inevitable extra cost and complication. And thanks to its SRAM 1x10 transmission, you can be confident the Fuse Comp is bang up to the minute.

Made for maximising fun on the trails, the Fuse Comp 6Fattie is the Specialized Fatboy’sclose cousin, but lighter weight and, arguably, more all-round practical.

When Enduro Mountainbike Magazine reviewed the fundamentally similar Expert version of the Specialized Fuse 6Fattie, they concluded:

…just look at its traction, stability and descending prowess. It’s a serious contender and a definite recommendation if you’re after a simple but potent bike! We loved it.’ See full review.

The benefits of being plus-sized

  • It's generally accepted that tyres define the bike.
  • Specialized developed an all-new 650B x 3 inch 6Fattie version of their Ground Control tyre to create this bike.
  • Significantly this bike is named after its 6Fattie tyre.
  • For all their heft, these tyres climb with great agility.
  • Thanks to the tyres' grip and their width, the Specialized Fuse Comp 6Fattie retains traction in conditions that might stall a skinnier tyre.
  • Thanks to the tyres' volume, this hardtail emulates the downhill cushioning of a full suspension bike - without the inevitable extra cost and complication.
  • Lower air pressures can be run to maximise cushioning and traction.
  • 69% increase in tyre contact patch.
  • More floatation = more speed.
  • Tyre volume increases by 56%.
  • The tyre absorbs bumps without slowing down the rider
  • More traction and floatation = more control and speed = more fun

To conclude, this design creates such a fun bike to ride, some people are wondering if plus-sized tyres might become the natural choice for the hardtail trail bike of the future (except, perhaps for XC racers).

Specialized Fuse Comp 6Fattie

  • The M4 Premium Aluminium durable lightweight frame boasts a low and slack geometry (67 degree head tube / 73 degree seat tube angle) that's equal parts snappy and efficient on climbs and descents.
  • Specialized developed an exclusive Diamond Stay that accommodates the 6Fattie wheels/ tyres without compromising on their hallmark short (43cm) chainstays that provide unrivalled handling and climbing prowess.
  • SR SunTour Raidon 650+ fork's 100/120mm (size-specific) of travel soaks up trail bumps, while its compression and rebound adjust enable you to dial-in the damping to your liking.
  • Custom WTB Scraper i45 wheelset has a fat 45mm width and alloy construction for the perfect blend of speed and strength, which means that you'll experience less deflection, increased traction and more stability—all at lower tyre pressures.
  • 650bx3.0" 6Fattie Ground Control tyres feature a perfectly sized contact patch for life-changing levels of traction and control while cornering, all without sacrificing climbing efficiency or descending prowess.
  • The Stout XC crankset would be the perfect complement to any one-by drivetrain, but here, its strong alloy construction makes it ideal for power transfer on climbs and when descending through technical rock gardens.
  • The dropper seapost, which makes it easy to adjust saddle height to the terrain on-the-fly, adds to this bike's pure fun credentials.
  • The SRAM X5/X7 1x10 transmission makes the advantages of one-by drivetrains more affordable than 1x11.

The benefits of the SRAM 1x10 drivetrain

  • Thanks to its 11-40 tooth 10-speed cassette, you get a massive gear range in a simplified format comprising a single shifter, a single gear mech and a single chainring.
  • Doing away with the front derailleur, the LH shifter and one or two chainrings means less weight, less complication and less to go wrong.
  • This 1 x 10 transmission delivers benefits any cyclist can appreciate.
  • The beginner will be spared learning about what they have to push or pull on each lever to get into a lower or higher gear.
  • With a single lever, gear shifting becomes immediately more straightforward.
  • Even massively experienced racing mountain bikers appreciate this simplicity in the heat of competition.
  • No more 'double shifting' to get in the right gear.
  • The SRAM X.7 rear derailleur employs the same roller bearing clutch and cage lock mechanisms, proven on SRAM XX1 transmissions to keep the chain in constant tension and deliver incredibly positive shifting, while virtually eliminating derailleur bounce and chain slap.

'Specialized Fuse Comp 6 Fattie
Take a look at the world's strongest man, and you're not going to find some chiselled Adonis. You're going to find someone who has more volume. Behind the "extra" surface area, though, there's a man that can dominate a caber toss and run down the tarmac with a plane in tow. Mathematically, it could be broken down as more volume + versatility = dominance, and that's exactly what's at play with the Fuse Comp 6Fattie. Our 6Fattie Wheel System uplifts the Fuse to have more traction and control than any hardtail before it, while its no-nonsense build is custom spec'd to get the job done, no matter how rugged, technical, or hair raising that job might be.'


Mountain Bike Sizing Guide.

Bike sizing guide by brand.

See all Mountain Bikes.

Technical Specifications


Frame:Specialized M4 Premium Aluminium, Trail 6Fattie Geometry, fully-butted w/ smooth welds, tapered head tube, tapered seat tube, forged 160mm disc mounts, 148mm thru-axle dropouts, replaceable alloy derailleur hanger
Fork:SR Suntour Raidon 650+, air spring, S: 100mm travel, compression adjust, rebound adjust, tapered alloy steerer, alloy stanchions, 15x110mm thru-axle
Rims:WTB Scraper i45 650b, double-wall, 45mm inner width, 18mm deep, TCS tubeless compatible, sleeved, 24/28h
Rear Hub:Specialized Stout XC Pro 148, disc, alloy, loose ball bearings, 12x148mm thru-axle, 28h
Front Hub:Specialized Stout XC Pro 110, disc, alloy, cartridge bearings, 15x110mm thru-axle, 24h
Tyres:Specialized 6Fattie Ground Control, 60TPI, 2Bliss Ready, folding bead, 650bx3.0"
Spokes:Stainless, 14g, black
Shift lever:SRAM X5, 2x10, trigger
Front mech:none
Rear mech:SRAM X7 Type 2.1, 10-speed, long cage
Cassette:Custom Sunrace, wide range, 10-speed, 11-40t
Chain:KMC X10L, 10-speed, w/ reusable MissingLink
Crankset:Specialized Stout XC, forged alloy, 148-specific chain line, PF30, Cr-Mo spindle, 30T, 76mm BCD spider
Bottom bracket:Samox, PF30, sealed cartridge
Seatpost:TranzX YSP03 dropper, internal cable routing, remote lever, 30.9mm, S: 100mm travel, M/L/XL: 120mm travel
Saddle:Body Geometry Henge Comp, thin padding, hollow Cr-Mo rails, 143mm
Handlebar:Specialized Demo, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 25mm rise, 780mm, 31.8mm
Stem:Specialized XC, 3D forged alloy, 4-bolt, 6-degree rise
Rear Brake:TRP Slate X2, hydraulic disc, dual piston, I-spec compatible, Matchmaker adapter, 160mm rotor
Front Brake:

TRP Slate T4, hydraulic disc, 4-piston, metallic pads, 180mm rotor


Brake levers:TRP hydraulic with tooled reach adjust


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.