Specialized Stumpjumper EVO 2021-2023 suspension bearing kit. NOTE: EVO kit is differnt than other 2021 Carbon Stumpjumper frames. Includes 12 pcs Enduro MAX (full complement) sealed cartridge bearings, all of which are treated with Black Oxide anti-corrosion bearing race treatement. The main pivot bearings are special double-row bearings. NOTE: If black oxide bearings are not available, Enduro MAX bearings without the black oxide finish may be substituted.