420 R1 - Works Chain - 120 Links - 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 lb. average tensile strength - Chromised 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 - Clip type link included