Trek Fuel EX suspension bearing kit for frames manufactured in 2016. Includes 10 pcs Enduro sealed cartridge bearings. 8 pcs are MAX (full complement). 6 pcs have Black Oxide anti-corrosion bearing race treatment. NOTE: If black oxide bearings are not available, Enduro MAX bearings without the black oxide finish may be substituted. 2 pcs are special double-row bearings.