The Cannondale F-SI Carbon 5 2019 Mountain Bike is the entry level bike in the F-SI range. It doesn’t come with a Lefty Ocho fork but it does come with a carbon frame that weighs in at just 1.1kg and is full of Cannondale’s tech.


Cannondale F-SI Carbon 5 2019 Mountain Bike Green

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Cannondale F-SI Carbon 5 2019 Mountain Bike Green

Season : 2019

Brand : Cannondale

Code : C25509M30

Weight : 0KG

The Cannondale F-SI Carbon 5 2019 Mountain Bike is the entry level bike in the F-SI range. It doesn’t come with a Lefty Ocho fork but it does come with a carbon frame that weighs in at just 1.1kg and is packed full of Cannondale’s propriety  tech. The F-SI is all about pushing the limits of what an XC hardtail can do. No other hardtail descends as fast, climbs as nimbly, or kicks harder, smoother.

The F-SI is super light but that’s almost a by-product of what Cannondale were aiming for with the F-Si. The Cannondale engineers focused on features that deliver real performance benefits out on the course. Features like Ai and OutFront, or improved compliance, or improved durability. That’s what wins races, not saving the weight of a few sips of water.

Cannondale’s AI tech features on a lot of their road and mountain bikes. It makes the backend of the bike asymmetrical with an offset drivetrain. This allows them to make the back end of the bike much shorter which translates to better acceleration, better traction and more agile handling. The OutFront geometry slackens the head angle and lengthens the fork rake to make the bike more stable and give better control on descents.

The F-SI is designed as an XC race bike and it does have a race orientated ride position but this bike also works great for any fast cross country riding. If you focus more on speed and distance covered rather than being gnarly then this could be the bike for you.

The F-SI Carbon 5 comes with a Rockshox Reba SL fork, tubeless ready wheels, SRAM NX Eagle gearing and Shimano MT500 brakes. It’s a carefully picked mix of components that are great value and work really well.


This bike is perfect for

Aspiring XC racers, marathon and endurance racers, or anyone who just likes going really fast cross country. With tried and tested components and a super light carbon frame this is a bike that gets you into XC racing at an affordable price point.


Key Features

  • Lightweight Ballistec carbon frame with super short AI offset rear end
  • Rockshox Reba SL Solo Air forks
  • Tubeless ready 29er wheels and mixed Shimano and SRAM equipment


  • €1,828.77
  • $1,651.55
  • $2,455.26
  • kr19,249.91
  • kr15,267.11
  • kr13,662.40
  • $2,568.56
  • ¥181,423.04

Understanding the Cannondale Mountain Bike Range

Not sure which Cannondale mountain bike is right for you? We’ve put together a Guide to the 2019 Cannondale Mountain Bike Range to help you choose.


Why buy a Cannondale?

Cannondale are known as one of the most innovative brands in the bike industry. They have a reputation for doing things their own way but at the core their bikes are always built around really top quality frames built with cutting edge tech. If you buy a Cannondale you are getting a top class frame, innovative ideas and something a little different from the norm.
Technical Information
Technical Information
FRAME - ALL-NEW F-Si, BallisTec Carbon, SAVE, PF30A, tapered head tube, Speed Release 12mm thru axle, Ai Offset
FORK - RockShox Reba RL, 100mm, Solo Air, 15x110, tapered steerer, 51mm offset
RIMS - WTB STX i23 TCS, 28h, tubeless ready
HUBS - Formula 15x110 front, 12x148 rear w/ HG driver
SPOKES - DT Swiss Champion (Ai Offset dish - rear)
TYRES - Schwalbe Racing Ray Performance 29 x 2.25 front, Racing Ralph Performance 2.25" rear, Addix Compound, tubeless ready
CRANK - Truvativ Stylo 6K, 34T, Ai Custom
BOTTOM BRACKET - Cannondale Alloy PressFit30
CHAIN - SRAM NX Eagle, 12-speed
REAR COGS - SRAM PG-1230, NX Eagle, 11-50, 12-speed
SHIFTERS - SRAM NX Eagle, 12-speed
HANDLEBAR - Cannondale C3 Flat, 6061 double-butted Alloy, 8-degree sweep, 760mm
GRIPS - Cannondale Locking Grips
STEM - Cannondale C3, 3D Forged 6061 Alloy, 1-1/8", 31.8, 7-degree
HEADSET - Integrated, 1-1/8 to 1.5", sealed angular contact bearings (Integrated steer stop size small only)
BRAKES - Shimano MT500 hydro disc, 160/160mm RT56 rotors
BRAKE LEVERS - Shimano MT500 hydro disc
SADDLE - Fabric Scoop Shallow Sport, steel rails
SEATPOST - Cannondale C3, 7075 Alloy, 27.2 x 400mm
EXTRAS - Speed Release rear axle
WEIGHT - 10.8 kg / 23.8 lbs (MD)
Sizing Information






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