XAM 520NMX X-Ring Narrow Chain - Gold / GoldXAM Narrow X Ring chains have X shaped seals and improved metallurgy giving you 7 times longer wearlife than standard O Ring chains. Viewed in cross section, the X Ring has two lubrication pools and contact lips versus the single contact design of a standard O Ring chain. Giving the chain a longer life gives you more value for your money. Having a narrower X Ring seal vs other X Ring chains, offers an even lighter weight option with even less
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