Giant Trance X Aluminum 29 suspension bearing kit for 2021 frames. Includes 12 pcs Enduro MAX (full complement) sealed cartridge bearings, 8 of which have Black Oxide anti-corrosion bearing race treatement. 2 of the bearings have special extended races. NOTE: If black oxide bearings are not available, Enduro MAX bearings without the black oxide finish may be substituted.