Enduro’s premium bottom bracket features XD-15 45-degree Angular Contact bearings pressed into precisely machined aluminum TorqTite cups that easily thread into the BB shell, offering a straightforward, secure, and quiet installation. Manufactured to exacting standards at Enduro Bearings’ California facility, these XD-15 bearings utilize corrosion-resistant, cryogenically treated nitrogen steel races paired with Grade 3 Silicon Nitride ceramic balls, delivering unmatched performance and durability.
Enduro XD-15 bearings stand out because they improve with use rather than degrade. As the bearings wear in, the ceramic balls polish the races, creating an even smoother surface. Unlike other ceramic-hybrid bearings that may start fast but slow down over time, Enduro XD-15 bearings maintain their initial speed and power benefits while becoming progressively smoother and faster with continued use, ensuring lasting high performance.
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