XAM 428AO O-Ring ChainAll XAM O Ring chains are manufactured with hi carbon alloy steel for strength and durability. XAM utilises Nitrite Butadiene O Rings to seal in lubrication and deliver smooth power with minimal ring drag or loss of horsepower. XAM O Ring chains have "X" shaped seals and improved metallurgy giving you seven times longer wearlife than standard O Ring chains. Viewed in cross section, the X Ring has two lubrication pools and contact lips versus the
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