Intense Tracer 275 suspension bearing kit for carbon frames produced from 2014 through 2016. Includes 4 pcs Enduro MAX sealed cartridge bearings with 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), plus 4 pcs Enduro MAX shielded, greaseable bearings (for frames with "Zerk" grease fittings).