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Races have black oxide anti-corrosion treatment (this bearing is also available in a full 440C Stainless Steel version)
Measures: 37mm ID x 48.9 (49mm) OD x 6.5mm W
This bearing is also known as: HD446K, Trek W513538
Among other applications, this bearing is used on upper Trek Emonda late models.
Black Oxide treated chromium steel races and chromium steel balls. Superior sealing system ("Split Lip") and marine duty grease offer great corrosion resistance.
BEARINGS SOLD INDIVIDUALLY
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