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 29" Mountain Bike 2020
Rip up the climbs, have control on the descents and sprint hard for the line with the F-Si Carbon 4 29" Mountain Bike from Cannondale. The BallisTec carbon frame with SAVE technology is lightweight and tuned for rigidity and compliance so that acceleration comes easily and you're never left in search of traction when the race hots up. Upfront, the eye-catching Lefty Ocho fork with 100mm travel smooths out the trail whilst keep the front end light and snappy.
SRAM NX Eagle components deliver reliable gear shifting from a 1X drivetrain that features a 12-speed 11-50t cassette and powerful Shimano MT500 hydraulic brakes keep speed in check. Fast rolling 29" WTB wheels eat up the ground, carrying momentum over lumps and bumps and the easily configurable internal cable routing keeps maintenance low whilst enhancing the overall sleek look.
- Asymmetric Integration drivetrain for podium-level traction and clearance
- Proprietary BallisTec carbon is custom-tuned for rigidity, compliance and weight-saving
- Flat mount disc brake
- Tapered head tube
- Clean, configurable internal cable routing
- SAVE stays feature optimized carbon layup for superior comfort and control
- Integrated seat collar for a sleeker look and improved comfort
- Speed Release rear axle
- Cannondale Wheel Sensor
|FRAME||Cannondale BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset|
|FORK||Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset|
|HANDLEBAR||Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3deg rise, 8deg sweep, 760mm|
|GRIPS||Cannondale Locking Grips|
|STEM||Cannondale 3, 6061 Alloy, 31.8, 7deg|
|FRONT BRAKE||Shimano MT500 hydraulic disc, 160mm RT56 rotors|
|REAR BRAKE||Shimano MT500 hydraulic disc, 160mm RT56 rotors|
|BRAKE LEVERS||Shimano MT500 hydraulic disc|
|REAR DERAILLEUR||SRAM NX Eagle|
|SHIFT LEVERS||SRAM NX Eagle, 12-speed|
|CASSETTE||SRAM PG-1210, SX Eagle, 11-50, 12-speed|
|CRANKSET||Truvativ Stylo 6K DUB, 34T, Ai offset|
|CHAIN||SRAM NX Eagle, 12-speed|
|FRONT WHEEL||WTB STX i21 TCS, 28h, tubeless ready, Formula 15x110|
|REAR WHEEL||WTB STX i21 TCS, 28h, tubeless ready, Formula 12x148 with HG driver|
|FRONT TYRE||Schwalbe Racing Ray Performance 29 x 2.25", Addix Compound, tubeless-ready|
|REAR TYRE||Schwalbe Racing Ralph Performance 29 x 2.25" rear, Addix compound, tubeless-ready|
|SADDLE||Fabric Scoop Flat Elite, cro-mo rails|
|SEATPOST||Cannondale 3, 7075 Alloy, 27.2 x 400mm|
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.