RK O-Ring Chain

RK O-RING CHAINS
 (420SO, 428SO, 520SO, 525SO, 530SOZ1, 630SO)
 RK offers the best O-ring chains in the industry. All RK O-ring chains are constructed of hi-carbon alloy steel for strength and durability.
 RK utilizes Nitrite Butadiene O-rings to seal in lubrication and deliver smooth power with no O-ring drag or loss of horsepower