Name: SILCA Protocol RCG-4 Gravel Tire
SKU: 12935
Availability: BackOrder

Description

The ultimate off-grid tire for sloppy mud, sand, and loose rock. The Protocol RCG-4 utilizes aggressive, widely spaced lugs that shed sticky loam and mud. Designed to bridge the gap between adventurous gravel racing and mixed trail terrain, this tire thrives in shifting, unpredictable conditions like mud, sand, and steep, loose rock. Wrapped in full bead-to-bead puncture protection, it gives you the confidence to tackle everything from singletrack, OHV roads and off-camber loose rock without fear of sidewall tears.

The RCG-4 features an aggressive, wide-spaced knob profile utilizing fewer, but significantly larger, lugs than our RCG-3 model. This intentional spacing prevents dirt and sticky loam from packing together and caking the tire. In sloppy conditions where other tires might clog and lose traction, the RCG-4 actively flings mud away, ensuring reliable bite and uninterrupted momentum.

• 45, 50, 55mm options
• 545g in 45mm, 620g in 50mm, 650g in 55mm
• 120 TPI
• SealSkin Bead-to-Bead Protection
• Fastest Pulsar compound
• Width as measured on a 25mm rim after 24 hours
• Designed for mud and extreme conditions
• Aggressive knob spacing for mud shedding and increased grip

The Protocol RCG-4 Gravel Tire

RCG-4 Architecture

An aggressive, wide-spaced knob profile that uses fewer but significantly larger lugs than the RCG-3. That intentional spacing stops dirt and sticky loam from packing together, so the tire actively flings mud away instead of clogging and losing traction.

Enhanced Protection

Wider, taller knobs put more rubber between your casing and the rocks, and the sidewall carries an added layer of protection for the terrain this tire is built to cross. It is the most protected tire in the Protocol gravel line, chosen for courses that punish thin casings.

Ideal Conditions

Sloppy mud, sand, and steep, loose rock, where the surface shifts under you and grip decides the day. It bridges adventurous gravel racing and mixed trail terrain, from singletrack to OHV roads and off camber loose rock.

Protocol Tire Technology

Pulsar Compound
A high performance rubber and silica race compound engineered to hold rolling efficiency, grip, and durability in balance rather than trading one away for another.

Race Casing
A race casing architecture developed around modern tire pressures, so the tire keeps its shape and its ride quality at the pressures wide rims actually run.

CarbonBead BeadLock
Carbon fiber bead technology that keeps the tire dimensionally stable across its whole life, so the width you measure at installation is the width you keep.

SealSkin
Enhanced puncture protection for terrain that asks more of the casing, adding durability where the ground is rough enough to make it part of being fast.

Tubeless Ready
Engineered for modern tubeless systems from the bead out, so sealant, valves, and lower pressures all work the way they were meant to.