Silca Protocol RCG-4 Gravel Tyre

The tyres we wanted to ride didn’t exist.

Years of studying tyre pressure, rolling resistance, aerodynamics, vibration losses, rim width, sealant, valves, rim tape, and TPU tubes taught us that a modern race tyre is more than tread and rubber. It’s part of a complete tyre system where every engineering decision affects performance. We weren’t looking to make another tyre. We were looking to build the tyres we wanted to ride. Tyres designed around the conditions we race, the widths we believe modern riders need, and the performance characteristics we value most.

That’s PROTOCOL.

Protocol RCG-4

Directional tread made to shed mud and have maximum traction and control for rough, loose, and technical terrain.

Ideal for:

• Technical gravel builds
• High-volume race setups
• Progressive gravel platforms

Protocol RCG-4 Technologies

Pulsar Compound

Hi-performance rubber/silica race compound engineered to balance rolling efficiency, grip, and durability.

Race Casing

High-performance casing architecutre developed around modern tyre pressures.

CarbonBead BeadLock

Carbon fibre bead technology that maintains dimensional stability throughout the life of the tyre.

SealSkin

Enhanced puncture protection for conditions where additional durability becomes part of the complete performance equation.

RCG-4 Specifications

Dimensional Reference

Measured tyre width is based on a 25 mm internal rim width and recorded 24 hours after installation. Actual installed width will vary with rim dimensions.