Silca Protocol RCG-4 700c Tire When the Surface Stops Cooperating Mud, sand, and loose rock are where most gravel tires become a liability. The RCG-4 is built for exactly those conditions, sitting at the aggressive end of the Protocol gravel line and aimed at riders who need control over speed when the terrain turns unpredictable. Fewer, taller, and wider-spaced knobs than the RCG-3 keep dirt from packing into the tread, so the tire actively clears itself and holds grip where other tires clog and slide. Full bead-to-bead Seal Skin protection backs up the aggressive tread, so singletrack detours and off-camber rocky sections don't cost you a sidewall. Features Aggressive wide-spaced knob tread fewer but significantly larger lugs than the RCG-3 shed sticky loam and mud instead of packing together and losing traction Pulsar Compound high-performance rubber and silica race compound that holds rolling efficiency, grip, and durability in balance without trading one away for another Seal Skin Bead-to-Bead Protection full-coverage puncture layer gives casing protection from sidewall to sidewall for confidence on rocky and technical terrain Carbon Bead Lock bead rigid carbon fiber bead that does not stretch or creep, keeping the tire dimensionally stable and hookless-compatible across its full life 120 TPI casing supple, high-volume construction developed around modern wide-rim pressures for ride quality and structural integrity on demanding terrain Tubeless-ready, hookless-compatible engineered for modern tubeless setups; requires sealant to seal Specifications Size700c Width(s)45mm, 50mm, 55mm Compound Pulsar Compound Casing Seal Skin Bead-to-Bead Protection, 120 TPITPI120Bead Carbon Bead Lock (carbon fiber, folding tubeless)Tubeless Compatible Yes (tubeless-ready; sealant required)Hookless Compatible Yes Weight545g (45mm), 620g (50mm), 650g (55mm)Intended Use Gravel | Silca | Protocol Rcg-4 700C Tire 700X50, Race Casing | Rubber