The Rotor BSA30 bottom bracket cups allow the installation of 3D+ cranks with integrated 30mm axle in classic BSA threaded frames. High-quality Enduro silicone seals ensure buttery-smooth operation with unparalleled protection against dust, water and mud. It's the elegant new cup design which offers a sleek, modern look combining striking angles with smooth curves.

The BSA30 cups are not compatible with BB90 and BB89 frames!

Material: bearing cups: 7075 T6 aluminium
bearings: stainless steel
Weight supplement: manufacturer information