Renthal C401 520-Pitch 130-Link RR4 SRS Road Race Chain

The Renthal RR4 SRS Road Race Chain (C401) is a highly specialized, lightweight 520-pitch sealed ring chain engineered exclusively for Superbike and road racing applications where the combination of minimal weight and maximum durability is non-negotiable. With an average tensile strength of 8,204 lbf, the RR4 delivers higher strength than the standard R4 while maintaining the same weight per 100 links — making it the preferred choice for high-horsepower race machines.

Self Regulating Seal (SRS™) Technology:

At the core of this chain's performance advantage is Renthal's proprietary Self Regulating Seal (SRS™) technology. Unlike conventional O-ring or X-ring chains that progressively lose their seal as the chain wears, the SRS ring is pre-loaded during assembly to create a spring effect. As wear occurs, the SRS ring self-adjusts, maintaining a tighter seal against the side plates for a longer service life. This keeps specially formulated grease trapped around the critical pin and bushing area while blocking out dirt, water, and other contaminants.

Key Features:

• 520 pitch, 130-link configuration — ideal for race conversions and longer swingarm setups
• SRS™ ring technology enhances chain flexibility and provides smoother operation than standard O-ring chains
• Larger diameter pins manufactured from specially enhanced alloy steel for improved shock load and wear resistance
• Quad riveting process on each pin increases overall tensile strength
• Thicker inner and outer plates increase fatigue life under race conditions
• Shot-peened alloy steel side plates for high tensile strength and maximum impact load resistance
• Solid bushings and rollers for consistent power transfer
• Gold side plates with distinctive race appearance
• Solid pin rivet link included, matching the full durability of the chain
• Pre-stretched from the factory for immediate use with minimal break-in adjustment

The Renthal RR4 C401 is the top-tier choice for track day riders and professional Superbike racers who demand the absolute most from their drivetrain. Pair with Renthal 520-pitch sprockets for a complete, weight-optimized drive system.