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Renthal R1 Works drive chains afford your dirt bike lightweight strength with maximum power transfer. These high-strength chains offer excellent impact load resistance to deal with the stress of motocross and off-road racing. They are non-O-ring and are available in 420, 428, and 520 pitch. These are the best chains for any sprocket, but match them with Renthal chainwheels and you'll experience pure power and precision at your rear wheel. The fact is, whether you're racing or weekend riding, you'll love Renthal R1 Works drive chains.