Wheels Manufacturing T47A Outboard ABEC-3 Bearings For 24mm Cranks are designed for cyclists seeking reliable performance. These bottom bracket cups are perfect for T47A frames and cranks with a 24mm spindle diameter. Asymmetrical T47A threaded cups fit T47A frames and 24mm spindle cranks Internal bearings fit bottom bracket shells with widths from 77.5mm to 79mm Machined aluminium cups thread directly into Cervelo, Factor, and Felt T47A shells ABEC-3 grade bearings are easy to service or replace Includes a sleeve for protection against dirt and grime, and prevents wires and hoses from rubbing on the crank spindle Similar to BSA threaded cups: drive side is left-hand thread, non-drive side is right-hand thread Use quality grease for steel or aluminium BB shells, and anti-seize for titanium shells The Wheels Manufacturing T47A Outboard ABEC-3 Bearings For 24mm Cranks offer a practical solution for maintaining your bike's performance. With their durable construction and easy maintenance, these bearings are a great choice for any cyclist.