This precision-engineered bearing enables 30mm cranks to fit directly into BB86/92 framesets, solving the 41mm inner diameter constraint. The innovative flanged double-row design maximizes durability by doubling the ball count per side, creating optimal contact area in minimal space. Constructed with premium 440C stainless steel races and balls, these bearings contain 90% fill of high-pressure, waterproof grease for superior performance in demanding conditions.

Not all stainless steel is created equal.

Enduro selects premium 440C stainless steel for both balls and races, delivering exceptional longevity and corrosion resistance in challenging environments. This high-carbon alloy stands out within the 440-series for its superior strength, hardness, and wear characteristics, requiring sophisticated heat and cryogenic treatments to achieve optimal mechanical properties. While offering 20% less load capacity than standard 52100 chromium steel, this stainless composition excels in wet conditions, frequent washing scenarios, and sweat-prone applications. Specifically engineered for BB86/92 frames accommodating 30mm spindle cranksets (BB386 and BB30).