Trek Slash suspension bearing kit for 2021 and later frames. For carbon fiber as well as alloy frame models. Includes 12 pcs Enduro sealed cartridge bearings. 10 pcs are Enduro MAX bearings (full complement for greater load strength). 6 pcs are special double-row bearings. This kit INCLUDES all 4 shock mounting bearings (2 at the top and 2 at the bottom).