Cannondale F-Si Hi-MOD Frameset
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The 2019 Cannondale F-Si Hi-MOD Frameset represented the pinnacle of Cross-Country (XC) hardtail technology, engineered to be the fastest and lightest XC frame on the market. The frame is constructed with Hi-MOD BallisTec Carbon, Cannondale's premium carbon construction that maximizes stiffness while minimizing weight. This ultra-light chassis is specifically optimized for modern, technical XC racing, where explosive acceleration and precision are crucial. The geometry is aggressive and modern, featuring a slacker head tube angle for stability and a steeper seat tube angle for efficient climbing.
The most revolutionary aspect of the 2019 F-Si is the integration of the Ai (Asymmetric Integration) Offset Drivetrain. This shifts the entire rear triangle 6mm to the right, resulting in a perfectly symmetrical rear wheel. This creates more even spoke tension and a stiffer, stronger wheel. This asymmetric design also allowed for shorter chainstays (420mm), providing unparalleled agility and grip, without compromising mud clearance. The frame is optimized for 1x drivetrains and uses the PF30 bottom bracket standard.
This frameset is specifically designed around the revolutionary Lefty Ocho fork (not included), the lightest and most advanced single-sided XC fork. Its compatibility with the Ocho and the use of Cannondale's proprietary Speed Release thru-axle at the rear emphasize the focus on low weight and racing efficiency. The F-Si Hi-MOD is not just a hardtail; it is a technical masterpiece built for the professional XC racer seeking the ultimate combination of stiffness, lightness, and handling for winning races.
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Key specifications
Key specifications
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Brand |
Cannondale |
|---|---|
|
Frame material |
|
|
Model year |
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Specifications
| Axle | 148 x 12mm Speed Release (Ai Offset) |
| Basis kleur | Blue |
| Color | BLU |
| Size | S, XL |
| Frame material | Carbon |
| Model year | 2019 |
| Type | Mountain biking |
| Seatpost | 27.2 mm |
| SKU | C25399M20SM |
| Barcode | 1000000130690 |

Delivered to your home, safely and assembled
When you order a bicycle online from us, our mechanics in the workshop get straight to work to ensure your bicycle is shipped as quickly and safely as possible. For this, we use our own designed bicycle boxes, for optimal safety during transport.
Our team will contact you about the delivery time of your bicycle. Please allow for approximately 1 week.
Extensive bike fit possible
Every Woest bike includes a bike fit, so we and you know that you'll be comfortable for many kilometers to come.
After a thorough assessment of your body, the contact points of the bike are adjusted to perfectly match your body, using the most technically advanced bike fit technologies.
Our team will contact you regarding the delivery time of your bike and to schedule a bike fit with you. Please generally allow for 1 week.
Our Reviews
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Once again a good experience. Ordered a Sram Code RS brake set. Delivered quickly, unfortunately the handlebar clamps were forgotten but delivered without issues afterwards. Also the MMX.
JoostUpdated on Apr 14, 2026 -
Bought a cool Hollowgram R-SL50 wheelset for my gravel bike from Woest Sport at a great price. The rear wheel needed to be re-spoked according to the Cannondale AI principle, which they did very profes...
HansUpdated on 5 Oct 2025 -
Today, after some Googling, I went to Woest for new running shoes. I've been running in Asics Nimbus for over 20 years, and now, after a tip from a colleague, I decided to try Hoka. I was perfectly helped by the staff.....
HenkUpdated on 16 Mar 2023
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Pick up in storeImmediately available*
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Bike fittingHigh-end Retül bike fitting
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