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Cannondale F-Si Carbon 3 29" Mountain Bike 2019

★★★★★ ★★★★★
MSP £3,000.00 Save 20%

From only £74.68 per month

15.9% APR Representative. T&Cs Apply.

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Product ID: 1054967

Cannondale’s F-Si Carbon 3 29" Mountain Bike has been designed for rapid, cross country travel.

Whether racing or simply enjoying the trails, the BallisTec carbon frame and Lefty Ocho fork will ensure that all efforts are translated into forward motion, whilst the 12-speed SRAM GX Eagle gears and Level T hydraulic brakes provide a wide range of ratios and great stopping power.

Why buy your bike from Sigma Sports?

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Expert Advice

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.

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Built, Checked, Tuned and Tested

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.

Free Bike Delivery

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.

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Free 30-Day Bike Insurance

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 3 29" Mountain Bike 2019

Sitting in the middle of Cannondale’s hardtail cross country range, the F-Si Carbon 3 29" Mountain Bike offers lightweight, race-ready performance at a great price. The BallisTec carbon frame still benefits from their AI (Asymmetric Integration) system which moves the chainset and cassette outwards by 6mm allowing the chainstays to be shorter than normal for improved grip and power whilst still providing clearance for larger tyres. The Lefty Ocho fork has 100mm of travel to iron out the bumps, but can be locked out to maximise efficiency on smoother trails or tarmac sections.

Stan’s No Tubes Neo hubs are coupled with their Crest 3 rims for a reliable and lightweight wheelset that is all ready to be set up tubeless for greater comfort, grip and fewer punctures. The 12-speed GX Eagle drivetrain brings the simplicity and huge gear range of a 1x set up, with the 11-50 cassette providing an ultra low gear for steep hills, and no matter how wet or muddy the trails are the SRAM Level T hydraulic disc brakes offer tireless stopping power.


  • Cannondale BallisTec carbon frame
  • Cannondale Lefty Ocho fork with 100mm travel and cable lockout
  • SRAM GX Eagle 12-speed drivetrain
  • SRAM Level T hydraulic disc brakes
  • Stan's NoTubes wheelset with Neo hubs and Crest 3 rims, tubeless ready

Technical Specification

FRAME Cannondale F-Si, BallisTec carbon, SAVE, PF30A, tapered head tube, Speed Release 12mm thru axle, Ai Offset
FORK Cannondale Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset
STEM Cannondale C3, 3D Forged 6061 Alloy, 1-1/8", 31.8, 7 degree
HANDLEBAR Cannondale C2 Flat, butted 2014 alloy, 8 degree sweep, 760mm
FRONT BRAKE SRAM Level T hydraulic disc, 160mm Centerline rotor
REAR BRAKE SRAM Level T hydraulic disc, 160mm Centerline rotor
BRAKE LEVERS SRAM Level T hydraulic disc
SHIFT LEVERS SRAM GX Eagle, 12-speed
CASSETTE SRAM PG-1230, GX Eagle, 11-50, 12-speed
CRANKSET Truvativ Stylo 6K, 34t, Ai Custom
FRONT WHEEL Stan's NoTubes Neo Lefty hub, Stan's NoTubes Crest MK3 rim, 28h, tubeless ready
REAR WHEEL Stan's NoTubes Neo hub, Stan's NoTubes Crest MK3 rim, 28h, tubeless ready
FRONT TYRE Schwalbe Racing Ray Performance 2.25" tubeless ready clincher
REAR TYRE Schwalbe Racing Ralph Performance 2.25" tubeless ready clincher
SADDLE Fabric Scoop Flat Elite, ti rails
SEATPOST Cannondale C2 Carbon, 27.2mm
CLAIMED WEIGHT 10.1kg size medium

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.

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