Trek Session suspension bearing kit for 2018 Trek Session frames. Contains 10 pcs Enduro sealed cartridge bearings. 8 pcs are Enduro MAX bearings (full complement for greater load strength). 6 pcs of the MAX bearings have Black Oxide anti-corrosion bearing race treatment. The remaining 2 bearings are extra wide double row caged bearings. The bearings in the kit Include the two upper shock mount bearings.