Silca Protocol RCG-4 Gravel Tyre 700C

BUILT FOR THE ROUGHEST GRAVEL AND MOST UNPREDICTABLE CONDITIONS, THE SILCA PROTOCOL RCG-4 COMBINES AN AGGRESSIVE MUD-SHEDDING TREAD, PULSAR COMPOUND AND FULL SEALSKIN BEAD-TO-BEAD PROTECTION TO DELIVER CONFIDENT GRIP, DURABILITY AND SPEED ACROSS MUD, SAND, LOOSE ROCK AND TECHNICAL TERRAIN.

The SILCA Protocol RCG-4 is the most aggressive gravel tyre in the Protocol range, designed for riders who refuse to let rough terrain or challenging conditions dictate their pace.
Its widely spaced tread uses fewer but significantly larger knobs than the RCG-3, creating open channels that help clear mud and loose material rather than allowing the tread to clog. Taller, wider knobs provide increased bite across shifting surfaces while giving riders greater support and confidence when cornering through technical terrain.
Full SealSkin bead-to-bead puncture protection adds durability across both the tread and sidewalls, making the RCG-4 particularly well suited to rocky courses, technical gravel racing and adventurous riding where casing protection can be just as important as outright speed.


KEY FEATURES

Aggressive Mud-Shedding Tread
Widely spaced, oversized knobs help prevent mud, dirt and sticky surfaces from packing into the tread, allowing the tyre to maintain traction in challenging conditions.

High-Traction Knob Profile
Fewer but significantly larger knobs than the RCG-3 provide increased bite across loose and shifting terrain, including mud, sand and steep loose rock.

SealSkin Bead-to-Bead Protection
Enhanced puncture protection extends across the tyre from bead to bead, providing additional defence for both the tread and sidewalls when riding through rocky and technical terrain.

Pulsar Compound
SILCA's high-performance rubber and silica race compound balances rolling efficiency, traction and durability to help maintain speed despite the RCG-4's aggressive tread.

120 TPI Casing
A high-quality 120 TPI construction provides a responsive, performance-focused ride while supporting the larger tyre volumes and lower pressures used on modern gravel bikes.

High-Volume Performance
Available in 45 mm, 50 mm and 55 mm widths, allowing riders to maximise traction, comfort and control according to terrain and bike clearance.

Tubeless Ready
Engineered specifically for modern tubeless systems, allowing lower operating pressures for increased grip, compliance and control.


TECHNOLOGY

Pulsar Compound
SILCA's performance rubber and silica compound is engineered to balance low rolling resistance, grip and durability rather than sacrificing one characteristic to maximise another. This helps the RCG-4 retain race-focused efficiency despite its more aggressive tread design.

Race Casing
A performance casing architecture developed around the lower pressures and wider rims used by modern gravel bikes. The construction helps maintain tyre shape and ride quality while delivering the compliance required for rough terrain.

SealSkin Bead-to-Bead Protection
The RCG-4 receives the highest level of casing protection in the Protocol gravel range. SealSkin protection extends from bead to bead, adding defence to both the tread and sidewalls against cuts, impacts and punctures encountered on rocky and technical terrain.

CarbonBead BeadLock
Carbon fibre bead technology helps maintain dimensional stability throughout the tyre's service life, keeping the tyre's dimensions consistent after installation.

Aggressive Open Tread Architecture
The RCG-4 uses fewer, larger and more widely spaced knobs than the RCG-3. The open spacing helps release mud and sticky debris instead of allowing it to accumulate between the knobs and reduce traction.

Enhanced Knob Protection
Wider and taller tread blocks place additional rubber between the casing and the terrain, providing another layer of defence against rocks and impacts while increasing grip.

Tubeless Ready Construction
Engineered from the bead upwards for use with modern tubeless systems, allowing tyre, rim, sealant and lower operating pressures to work together for increased traction, comfort and puncture resistance.


WHY TO CHOOSE

Choose the SILCA Protocol RCG-4 when your gravel riding regularly extends beyond smooth roads and hardpack surfaces into genuinely challenging terrain.
Where the RCG-1 prioritises outright rolling speed and the RCG-3 balances speed with mixed-terrain versatility, the RCG-4 shifts the emphasis towards maximum grip, control and protection.
Its aggressive open tread is particularly effective when mud, sand or loose material would overwhelm a faster, closely spaced gravel tread. Full bead-to-bead SealSkin protection also makes it the strongest choice in the Protocol gravel range for rocky courses and terrain where sidewall damage is a genuine concern.
For riders tackling technical gravel races, adventurous routes or unpredictable Australian conditions, the RCG-4 provides the traction and protection required to keep pushing when the terrain becomes difficult.


PERFECT FOR

Technical gravel racing, adventure riding, muddy courses, sand, steep loose climbs and descents, rocky gravel roads, singletrack and rough mixed-terrain routes.
An excellent choice for Australian gravel riders looking for maximum traction and puncture protection from a performance-focused tubeless gravel tyre, particularly when conditions are too loose, muddy or technical for a conventional fast-rolling gravel tread.


FULL SPECIFICATIONS

Brand: SILCA
Model: Protocol RCG-4
Type: Aggressive performance gravel tyre
Wheel Size: 700C
Available Widths: 45 mm, 50 mm, 55 mm
ETRTO: 45-622, 50-622, 55-622
Compound: Pulsar Compound
Casing: Race Casing
Casing Density: 120 TPI
Puncture Protection: SealSkin Bead-to-Bead Protection
Bead Technology: CarbonBead BeadLock
Tread: Aggressive, widely spaced large-knob tread
Tubeless Ready: Yes
45 mm Weight: Approximately 545 g
50 mm Weight: Approximately 620 g
55 mm Weight: Approximately 650 g
Measured Rim Internal Width: 25 mm
Recommended Minimum Sealant - 45 mm: 90 ml
Recommended Minimum Sealant - 50 mm: 100 ml
Recommended Minimum Sealant - 55 mm: 100 ml
Primary Conditions: Mud, sand, loose rock, technical gravel and extreme conditions