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.
Cannondale F-Si Carbon 5 Mountain Bike 2018
A cross-country race machine, the Cannondale F-Si 5 Mountain Bike is ready to help you achieve your best performances on the trails. This hardtail is constructed from BallisTec carbon so you can kick harder, tackle technical trails at speed and climb faster. SPEED SAVE micro-suspension and Asymmetric Integration (AI) in the rear triangle make for an incredibly agile yet stable ride.
The roughest trails will be smoothed out thanks to the 100mm of travel in the RockShox Reba RL fork, and this bike rolls smoothly on stiff, strong wheels and grippy Schwalbe Racing Ralph Performance tyres. Smooth and reliable shifting comes courtesy of the Shimano SLX and XT drivetrain, and the 2x11-speed setup provides plenty of gears to manage every terrain. The Shimano Deore MT500 hydraulic disc brakes and 180mm rotors deliver powerful stopping so you can tear down fast descents in confidence.
Features
- BallisTec carbon fibre frame, with Speed SAVE micro-suspension and Asymmetric Integration
- RockShox Reba RL 100mm travel fork to smooth out the rough stuff
- Shimano SLX/XT 2x11 speed gears give you an incredible range for climbing and descending
- Shimano Deore MT500 hydraulic discs with 180mm rotors deliver ample stopping power for any trail
- Size small is set up with 27.5-inch wheels and size medium/large/extra large have 29-inch wheels
Please note: The image is 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
| FRAME | Cannondale F-Si, BallisTec Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube, Ai Offset, 27.5" (S), 29" (M-XL) |
| FORK | RockShox Reba RL, 100mm, Solo Air, Tapered Steerer, Maxle Lite, 51mm offsetsystem |
| REAR SHOCK | N/A |
| HEADSET | Cannondale HeadShok Si |
| STEM | Cannondale C3, 6061 Alloy, 1.5", 31.8, -5° |
| HANDLEBAR | Cannondale C3 flat, 6061 double-butted Alloy, 760mm |
| GRIPS | Cannondale Locking Grips |
| FRONT BRAKE | Shimano Deore MT-500 hydro disc, 180mm (S-160mm) |
| REAR BRAKE | Shimano Deore MT-500 hydro disc, 160mm |
| FRONT DERAILLEUR | Shimano SLX, direct mount |
| REAR DERAILLEUR | Shimano XT, 11-speed Shadow Plus |
| SHIFT LEVERS | Shimano SLX , 2x11-speed |
| CHAIN | KMC X11, 11-speed |
| CRANKSET | Cannondale Si, Ai, BB30, FSA 26/36 rings |
| CASSETTE | SunRace, 11-42T, 11-speed |
| BOTTOM BRACKET | Cannondale Alloy PressFit30 |
| PEDALS | None |
| RIMS | WTB STP i19, Tubeless Ready, 29" (size small 27.5") |
| HUBS | Formula DC51 front, Formula DC-1422 Ai Offset dish - Rear |
| SPOKES | DT Swiss Competition (Ai Offset dish - Rear) |
| FRONT TYRE | Schwalbe Racing Ralph Performance 29x2.25" (size small 27.5x2.25") |
| REAR TYRE | Schwalbe Racing Ralph Performance 29x2.25" (size small 27.5x2.25") |
| SADDLE | Cannondale Stage 4 |
| SEATPOST | Cannondale C3, 6061 alloy, 27.2x350mm (S,M) 400mm (L,XL) |
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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