The Silca Sicuro Carbon Stealth Bottle Cage combines more than 40 years of carbon fibre engineering experience with Silca's exclusive three-stage testing protocols to produce the ultimate lightweight, strong and secure bottle cage.
True to its namesake, Sicuro (Italian for secure), has been created from the ground up to hold your bottle securely but without undue grip pressure. The design of these bottle cages was directly driven from hundreds of lab tests, high-speed video analysis of cage behaviour and more than a year of on-road testing over different surfaces.
The design of the Silca Sicuro Carbon Cage focuses on three factors: perfectly matched geometry, lateral stability and vibration damping. The majority of water bottle ejections in carbon cages happen because the cage fails to prevent the bottle from 'walking' upwards when exposed to certain frequencies of vibration.
Most companies try to solve this by increasing grip force on the bottle, making it harder to insert and remove. The problem with this is that along with wearing out bottles, the tight grip can actually hold the bottle in a semi-ejected state as it walks upward when exposed to certain washboard-type surfaces, placing it perfectly for ejection on the next large hit.
By using a multi-axis shake rig and high-speed cameras, Silca has learned that less grip force combined with a perfectly matched forward lip geometry and unique 'wings' on the sides of the cage actually drives the bottle back down into the cage under these same frequencies.
Silca also learned that walking of the bottle could be further eliminated by adding a film of viscoelastic polymer to the layup, allowing the cage itself to reduce the vibration forces on the bottle. Thus, the Sicuro Carbon perfectly balances strength, security and low weight. The result: no walking, no ejecting.
One of the most interesting learnings to come out of the testing phase was the effect that cage bolts had on both bottle retention as well as cage fatigue life. Every Sicuro Carbon bottle cage comes with two premium titanium mounting bolts. Each bolt is machined complete in one operation from 6Al/4V titanium on a Swiss lathe. The low-profile flange head design of the bolt distributes load across nearly three-times more surface area than a cap screw and two-times the surface area of a button head for increased rigidity and lower stress.
The Sicuro Carbon Bottle Cages feature the same elongated mounting slots that Silca pioneered with the introduction of the Sicuro Titanium Bottle Cages. These elongated mounting slots give you 12mm of fore/aft adjustment to account for the variance in bottle boss location across different frame manufacturers.