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 2015
After a fun, 'go anywhere' mountain bike? The Specialized Fatboy Mountain Bike 2015 is just for you. Using a lightweight, stiff aluminium frame and pairing to with fat, mountain bike tyres. Fat Bike geometry offers a comfortable yet engaging ride, leaving you in the optimum position for handling this beast of a bike.
New Specialized M4 Premium Aluminium has been used in the frame, to make it incredibly lightweight, stiff and comfortable. Performance is delivered with a new Specialized full monocoque FACT carbon fork. This setup provides adequate clearance for 5 inch tyres.
SRAM, Tektro and KMC provide strong, durable and attractive components.
Specialized handlebars, stem and seatpost are all ergonomically designed, stiff and lightweight, while the Specialized Fatboy SL alloy disc wheels are durable, roll smoothly and being disc equipped, stop powerfully.
A fantastic handling mountain bike that benefits from the Specialized Ground Control Fat tyres being added. 26 inch and 4.6 inches wide for impressive levels of grip, puncture resistance and low rolling resistance.
Sit comfortably on the Fatboy, on the Specialized Body Geometry Mountain saddle, designed specifically for mountain biking. Comfortable, supportive and durable.
Hydraulic Tektro Gemini disc brakes offer excellent stopping modulation, are easy to maintain and work perfectly whatever the weather or however muddy your bike gets.
Features
- Mountain bike for all terrains
- New Specialized M4 Premium Aluminium frame
- Fat Bike Geometry
- Specialized mountain bike specific handlebar, stem and seat post
- Specialized Fatboy 26 inch disc rim
- Tapered headtube improving handling and feedback
- Replaceable alloy derailleur hanger
- Stylish gloss Gallardo orange, cyan and white colour scheme
Specification
FRAME New Specialized M4 Premium Aluminium, Fat Bike Geometry, fully butted w/ smooth welds, tapered headtube, post-mount disc dropouts, replaceable alloy derailleur hanger
FORK Specialized FACT carbon, full monocoque, tapered steerer
HEADSET 1-1/8" upper, 1-1/2" lower, Campy style, integrated sealed cartridge bearings
STEM Specialized, 3D forged alloy, 4-bolt, 6-degree rise, anti-corrosion hardware
HANDLEBAR Specialized, low rise, double butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 31.8mm
GRIPS SRAM, S-Series Grip Shift, 92mm
FRONT BRAKE Tektro Gemini, hydraulic disc, resin pads
REAR BRAKE Tektro Gemini, hydraulic disc, resin pads
BRAKE LEVERS Tektro Gemini, hydraulic disc
FRONT DERAILLEUR SRAM X7, 2x10, low direct mount
REAR DERAILLEUR SRAM X7 Type 2, 10-speed, medium cage
SHIFT LEVERS SRAM S-Series, Grip Shift, 10-speed
CASSETTE Sunrace, 10-speed, 11-36
CHAIN KMC X10L, 10-speed, reusable Missing Link
CRANKSET Custom 2x10, alloy, 100mm CNC spindle, w/ BB
BOTTOM BRACKET Samox, PF30
PEDALS Nylon platform w/ moulded pins, loose ball, 9/16"
RIMS Specialized Fat 26" disc, alloy single wall, pin joint, 32h, w/ Fatboy logo
FRONT HUB Specialized MTB Hi Lo disc, alloy, sealed cartridge bearings, QR, 32h
SPOKES Stainless, 14g
TYRES Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6"
INNER TUBES Standard presta valve
SADDLE Specialized Body Geometry mountain, steel rails, 143mm
SEATPOST Alloy, 2-bolt, 12.5mm offset, 30.9mm, anti-corrosion hardware
SEAT BINDER Alloy, 34.9mm
Image shown for representation of colour way only, specification subject to change at any time. Bicycles do not come with pedals unless otherwise specified.
Technical Specification
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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