Bottom bracket bearings sit directly in your pedaling force path, which means worn bearings cost you watts and introduce play that accelerates wear elsewhere in the drivetrain. The SRAM BB30 Bearing Assembly provides the complete replacement set for BB30 bottom bracket shells—both bearings included, ready to press in.

BB30 was one of the first press-fit standards to gain widespread adoption, and frames built around it use a 42mm inner diameter shell that accepts these bearings directly without adapter cups or additional hardware. The 68mm shell width covers road applications, while mountain frames typically use 73mm shells with spacers to accommodate the wider stance. These steel bearings match the original equipment spec, maintaining the same tolerances and fit that the frame manufacturer designed around.

The practical reality of press-fit bottom brackets is that bearing replacement requires the right tools and some patience. You'll need a bearing press to install these correctly—hammering them in risks damaging the bearing races or the frame's bearing seats. If you're not set up for press-fit service, this is a job worth handing off to a shop with the proper tooling. The bearings themselves are straightforward steel units, prioritizing durability and serviceability over the marginal friction reductions of ceramic alternatives.... Read More