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 4 Mountain Bike 2017
With a premium BallisTec Hi-MOD carbon frame construction, the Cannondale F-Si Carbon 4 Mountain Bike offers an ultralight and strong frame for riders looking to take their off-road riding to the next level.
Cannondale's premium BallisTec Hi-MOD Carbon frame construction allows the bike to not only be light but also ultra-stiff, strong and responsive. For the fork, Cannondale has employed their iconic Lefty 2.0 fork, which offers 100mm of travel and its XLoc lockout allows you to put the power down when you need to.
In order to get you up and over those tough gradients, you are going to need a wide and accommodating range of gears. That is exactly what Shimano 11-speed drivetrain and SunRace cassette provide. With a 26/36 crankset and 11-40 cassette, this bike offers the ultra-low gears needed to power up and over steep climbs and the higher gears needed for building speed on descents.
Braking is provided by Shimano's Deore hydraulic disc brakes. These confidence-inspiring brakes provide the modulation and power required for tackling the trail at full speed - no matter what the conditions are.
WTB i19 tubeless ready wheels provide strength and stability, while the Schwalbe Racing Ralph Performance tyres keep you firmly gripping the trail.
FEATURES
- Cannondale's premium BallisTec Hi-MOD Carbon frame construction optimises low weight and stiffness while also featuring a geometry that is ready to tackle the toughest XC courses
- Tubeless Ready wheels offer versatility
- The iconic Lefty 2.0 fork with 100mm of travel, keeps you comfortable over the rough stuff and big drops
- Shimano's 11-speed shifting is reliable and responsive
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 | Cannondale F-Si Asymmetric BallisTec Hi-MOD Carbon SPEED SAVE PF30A 1.5 Si Head Tube |
FORK | Cannondale Lefty 2.0 100mm PBR Isolated Damper Technology with XC+ tune and updated controls Offset - 50mm (S) 55mm (M-X) |
HEADSET | Cannondale HeadShok Si |
STEM | Cannondale C3 6061 Alloy 1.5 31.8 -5 deg. |
HANDLEBAR | Cannondale C3 flat 6061 double-butted alloy 700mm |
FRONT BRAKE | Shimano Deore hydraulic disc 180/160mm |
REAR BRAKE | Shimano Deore hydraulic disc 180/160mm (S-160/160mm) |
FRONT DERAILLEUR | Shimano SLX direct mount 11-speed |
REAR DERAILLEUR | Shimano XT Shadow Plus 11-speed |
SHIFT LEVERS | Shimano SLX 2x11-speed |
CHAIN | Shimano CN-HG601 11-speed |
CRANKSET | Cannondale Si Ai BB30 FSA 26/36 rings |
CASSETTE | SunRace 11-40 11-speed |
BOTTOM BRACKET | Cannondale Alloy PressFit30 |
PEDALS | None |
RIMS | WTB STP i19 Tubless Ready |
HUBS | Lefty 60 front Formula DC-1422 rear (Ai Offset dish - Rear) |
FRONT TYRE | Schwalbe Racing Ralph Performance 29x2.1 tubeless ready, clincher |
REAR TYRE | Schwalbe Racing Ralph Performance 29x2.1 tubeless ready, clincher |
SADDLE | Prologo K3 |
SEATPOST | Cannondale C3 6061 alloy 27.2x350mm (XSSM) 400mm (LX) |
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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