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.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with PedalSure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and 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.
- 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.
|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|
|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|
|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 specified), 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.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.