BOLD MAGENTA part numbers are new for 2025 CHAINS PARTS-UNLIMITED.COM OFFROAD | 2025 CHAINS 745 NO. OF LINKS PART # 104 1222-0450 114 1222-0451 NO. OF LINKS PART # 116 1222-0452 120 1222-0453 NO. OF LINKS PART # Repl. rivet link 1222-0454 Repl. clip connecting link 1225-0467 520 R3-3 OFFROAD SRS CHAIN •Update to the R3 chain range; upgraded to the R4 ranges proven quad riveting manufacturing process • Renthal’s® SRS (Self-Regulating Seals) system increases service life of chain •Packaged pre-stretched for less adjustment during break-in •Rivet link has also been changed to a hollow end to facilitate easier installation that does not require a Quad Stake Rivet tool to install • High-carbon alloy steel pins, solid bushings and rollers, and shot peening of plates and rollers for increased fatigue resistance •Gold-colored side plates and copper-colored rollers help prevent corrosion •520 pitch; average tensile strength 7420 lbs. •Includes clip type and rivet connecting links NO. OF LINKS PART # 114 R1-520-114 116 R1-520-116 NO. OF LINKS PART # 120 R1-520-120 Clip connecting link R1-520-ML 520 R1 WORKS CHAIN • Premium-quality, high-strength, lightweight non-O-ring chain •Specifically designed for racing • The choice when high-strength, lightweight and maximum power transfer are essential •Shot-peened alloy steel side plates • Ultra-high 7,644 lbs. average tensile strength •Chamfered inner links reduce the chance of chain derailment • Chromized bearing pins resist wear, especially under offroad conditions • Extended bushings reduce friction, improve power transmission •Gold-colored side plates help reduce corrosion •The perfect match for Renthal sprockets •Includes clip type link NO. OF LINKS PART # 120 R1-420-120 130 R1-420-130 NO. OF LINKS PART # Repl. clip connecting link R1-420-ML 420 R1 WORKS CHAIN •A mini version of Renthal’s 520 R1 chain for today’s high-powered mini racing machines •Shot-peened alloy steel side plates • Ultra-high 4,609 lbs. average tensile strength •Chromized bearing pins resist wear •Pre-formed bushings distribute power loads evenly for greater chain life •Gold-colored side plates; copper-colored rollers •The perfect match for Renthal® sprockets •Includes clip type link NO. OF LINKS PART # 120 R1-428-120 130 R1-428-130 NO. OF LINKS PART # 140 1221-0017 Repl. clip connecting link R1-428-ML 428 R1 WORKS CHAIN •Designed for high-powered mini racing machines up to 100cc capacity that use 428 non-O-ring chain •Shot-peened alloy steel side plates •Extended bushings to reduce friction between outer and inner link plates, which maximizes power transmission • Ultra-high 4,496 lbs. average tensile strength •Case-hardened alloy steel bearing pins for maximum resistance to wear •Gold-colored side plates help reduce corrosion •The perfect match for Renthal sprockets •Includes clip type link NO. OF LINKS PART # 112 1220-0413 NO. OF LINKS PART # Repl. clip connecting link 1225-0550 415 R1 WORKS CHAIN •Premium high-strength chain; impact load resistance •Steel plates shot peened for high strength and maximum resistance •Chamfered inner links reduce derailment •Pre-formed bushings distribute load for longer chain life • Recommended for MX 2-strokes up to 70cc, MX 4-strokes up to 100cc and trials bikes up to 125cc •Includes master link and pair of latex gloves
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