2019 Cannondale F-Si Hi-MOD 1 Mens Hardtail Mountain Bike - Black

The Cannondale F-Si has always been about pushing the limits of what an XC hardtail is capable of, and the new version pushes it harder and further than ever. No other hardtail descends as fast, climbs as nimbly, or kicks harder, smoother. With the otherworldly performance of the new Lefty Ocho, you've got a whole-new level of XC capability, tailor-made to feed the needs of the XC obsessed.

At just 900 grams, the all-new F-Si is the lightest mountain bike frame Cannondale have ever made. It shaves 80 grams off its predecessor, and when you factor in the svelte new Lefty Ocho, you save a whopping 330 grams on the frame and fork. What's even more impressive is that, rather than chasing marketing grams, Cannondale engineers focused on features that deliver real performance benefits out on the course - features such as Ai and OutFront, or improved compliance or improved durability. That's what wins races,  not saving the weight of a few sips of water.

The all-new Lefty Ocho is the smoothest, stiffest ultra-light XC fork ever made. It floats through chop and steers through the choss like nothing else.

Short chainstays do wonders for traction and nimble handling, but they usually come at a cost. Not with Ai - this proprietary Asymmetric Integration drivetrain offset moves the gears and rear triangle over, helping creating space for much shorts stays while still having the clearance for big tyres and 2x drivetrains if you so desire. It even creates a stiffer, stronger rear wheel by evening out the dish.

Ideal for World Cup XC racers or anyone who aspires to XC racing glory. Featuring a Pure Modern XC rider position. Low, flat back with centred weight distribution. If your life revolves around the quest for podiums; if you weight, measure and analyse every element of your perparation; if your idea of fun is pushing your limits and making your competitors drop; basically if you're obsessed with XC, the all-new F-Si is the bike for you. Built to climb faster, descend harder, and sprint better than any other hardtail out there, it's serious XC goodness for those with serious XC issues.

LIGHT IS RIGHT

One of the lightest XC hardtails in the world, the new F-Si is over 300g lighter than the previous version. The frame has shaved 70g and the new Lefty Ocho has chopped a whopping 250g.

EVEN MORE OUTFRONT

A slacker head angle than the previous F-Si adds even more stability and control on sketchy descents. Custom 55mm long fork rake on the Lefty Ocho keeps handling precise and agile at slower speeds.

Ai ADVANTAGE

Ai offset drivetrain delivers even shorter chainstays than the original, for climb-winning traction and agility, with clearance for big tyres, 2x chainring compatibility and a stiffer, stronger rear wheel.

LONGER AND LOWER

Reach to the head tube has been increased slightly for improved control. An integrated seat binder looks super clean and exposes more seatpost length for improved comfort.

EVEN SMOOTHER

New race-tuned stiffness keeps things stout where needed for power transfer but adds even more bump-eating comfort so you can go harder for longer.