Enduro’s top-of-the-line bottom bracket solution features XD-15 45° Angular Contact bearings pressed into precision-machined aluminum TorqTite cups that thread together for a simple, secure, and creak-free installation. Manufactured to the highest standards at Enduro Bearings’ facility in California, USA, these XD-15 bearings combine corrosion-resistant, cryogenically treated nitrogen steel races with Grade 3 Silicon Nitride ceramic balls, creating an elite high-performance bearing system.
The standout feature of these bearings is that they improve with use. As the bearings wear in, the ceramic balls smooth the races even further, enhancing performance over time. Unlike other ceramic-hybrid bearings that may lose efficiency with use, Enduro XD-15 bearings maintain their initial speed and power advantages while becoming even faster and smoother with continued riding.
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