Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
Specialized Fatboy Mountain Bike 2017
Built for speed and manoeuvrability over pretty much any terrain, the Specialized Fatboy Mountain Bike 2017 is a riding revolution. The fat wheel system offers a degree of control and traction that you cannot find anywhere else in cycling. You get dramatically more traction, grip, and floatation than with traditional mountain tyres, all without sacrificing much to climbing efficiency. This results in more fun and a superbly high level of durability and ruggedness with a low-level of maintenance that is ready to brave the wilds.
Features
The frame features an M4 alloy construction that provides the ideal blend of efficiency and durability, while the geometry creates a roomy top tube and short chainstays for easy climbing and confident descending
A FACT carbon fibre fork provides tons of compliance and absorbs chatter, while simultaneously keeping the overall weight of the bike down
Specialized's Stout XC 90 alloy rims have been laced to Stout XC hubs to form a wheelset that's dependable, rugged, and efficient. So whether you're trail riding or ploughing through the snow, these wheels will be the perfect mix of performance and strength
26x.4.6" Ground Control tyres help soak up bumps, while also providing a game-changing level of traction, control, and floatation for better handling out in the wild
The Stout XC Pro one-by crankset features a forged alloy construction that provides plenty of security from chain drop, while also leading the way for an efficient, lightweight, and simplified drivetrain with plenty of gear range for hard drives on the flats and climbs
Image shown for representation of colourway only, specification subject to change at any time. Bicycles do not come with pedals unless otherwise specified.
Technical Specification
| FRAME | Specialized M4 Premium Aluminium, fully-butted w/ smooth welds, tapered head tube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger |
| FORK | Specialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing, open QR dropouts |
| HEADSET | 1-1/8" upper, 1-1/2" lower, threadless, Campy style, cartridge bearings |
| STEM | Specialized Stout XC, 3D forged alloy, 4-bolt, 6-degree rise, anti-corrosion hardware |
| HANDLEBARS | Specialized Stout, double-butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 31.8mm |
| GRIPS | Specialized Sip Grip, light lock-on, half-waffle, S/M |
| FRONT BRAKE | Tektro Gemini, hydraulic disc, resin pads, I-spec compatible |
| REAR BRAKE | Tektro Gemini, hydraulic disc, resin pads, I-spec compatible |
| BRAKE LEVERS | Tektro Gemini, hydraulic, reach adjust, I-spec compatible |
| FRONT DERAILLEUR | NA |
| REAR DERAILLEUR | SRAM X7 Type 2.1, 10-speed, long cage |
| SHIFT LEVERS | SRAM X7, 10-speed, trigger |
| CASSETTE | Custom Sunrace, wide range, 10-speed, 11-40t |
| CHAIN | KMC X10L, 10-speed, w/ reusable MissingLink |
| CRANKSET | Specialized Stout XC Pro, forged alloy, 30mm alloy spindle, 100mm spindle width, 28T, 76mm BCD spider |
| PEDALS | Nylon, loose ball bearings, 9/16", w/ reflectors |
| FRONT WHEEL | Specialized Stout XC 90, disc, alloy, single wall, 90mm wide, sleeve joint, hookless design, 32h, Specialized Stout XC 135, Hi Lo disc, alloy, sealed cartridge bearings, QR, 32h |
| REAR WHEEL | Specialized Stout XC 90, disc, alloy, single wall, 90mm wide, sleeve joint, hookless design, 32h, Specialized Stout XC 190, Hi Lo disc, alloy, sealed cartridge bearings, QR, 32h |
| FRONT TYRE | Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6" |
| REAR TYRE | Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6" |
| SADDLE | Specialized Body Geometry Henge Sport, steel rails, 143mm |
| SEATPOST | Alloy, 2-bolt, 12.5mm offset, 30.9mm, anti-corrosion hardware |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
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