Protocol RCG-4 (Contact Sales Rep to Order)

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For years, the cycling industry has treated gravel tires like oversized road tires, adding thick, heavy rubber casings with inefficient tread patterns as volume increased. This came at the expense of speed and ride quality. For SILCA’s entry into the tire market, we’re flipping the paradigm on its head after discovering that, in fact, the best way to make a gravel tire is to start with an XC mountain bike variant and distill it down to essentials. And to, of course, sprinkle in a dose of clever features developed from our expertise in optimizing cycling performance at the highest levels.  

Our widest tires use the thinnest casings and, throughout the lineup, increase thickness as tires get narrower. By shedding the bulk and weight of a thick rubber base and relying on high-volume, 120 TPI casings, our design approach delivers industry-leading rolling efficiency, enhanced traction, and lively ride feel without sacrificing structural integrity. 

The SILCA engineering secret lies in how our tires behave at modern gravel pressures. Historically, the assumption was that wider tires needed heavy-duty carcasses to resist punctures. However, we found that high-volume tires using lower air pressures naturally protect the tire by spreading impact forces over a much larger surface area.  

Think of it like the dangling ends of a mop head: the loose, low-tension strands are nearly impossible to cut with a blade. But they become much easier to slice when pulled tight. In terms of the casing threads inside a tire casing, reduced tension allows us to use a thinner and faster-rolling compound that’s more resilient to flats due to the inherent deflection afforded by less air pressure. 

In gravel riding scenarios, many traditional off-road tire designs fail the most in cornering maneuvers. Uniform lug heights force the entire casing to deform until the tread blocks pinch closed, flatten out, and lose their biting edges. On the contrary, our variable-height tread architecture features outer blocks that are taller than the center knobs. This layout recruits additional cornering traction much sooner and at lower lean angles, keeping the active biting edges in contact with the dirt to minimize casing deformation. The fore and aft asymmetric tread patterns feature independent traction edges tuned separately for braking and acceleration, utilizing directional center tracks to limit rolling resistance and forty-degree outer knobs to deliver maximum purchase through corners. 

Our tires are also optimized for modern wheel standards, ensuring they measure perfectly true-to-size on wide rims within twenty-four hours of inflation. For each size within every model, we’ll always indicate the rim spec it was measured on.  

And our Carbon BeadLock technology ensures SILCA tires maintain shape for life, regardless of how long they are installed on a rim. Material limitations have long plagued folding tires, as traditional Kevlar beads inherently absorb environmental moisture over time, causing what’s known as “creep.” Symptoms of creep include shrinkage as they age, development of lumps near the bead area, and, in severe cases, the dreaded side-to-side tire wobble when installed on a rim. We’ve solved this structural challenge by swapping Kevlar for carbon fiber. By doing so, SILCA tires have zero material stretch and moisture retention, ensuring the tire maintains a perfect interface with the rim throughout its lifespan.  

To guarantee tubeless performance, the casing is treated with a proprietary, latex-friendly mold release agent that actively bonds with sealant for better puncture sealing, rather than repelling it like can happen with standard manufacturing chemicals.