Trek Fuel EX suspension bearing kit for 2024 through 2025 models ("Gen 6"). Fits all carbon fiber and alloy frames. Includes 10 pcs Enduro sealed cartridge bearings. 2 pcs are special heavy duty double-row bearings. 8 pcs are Enduro MAX bearings (full complement of ball bearings/no retainer for greater load strength), 6 of which include double rows of bearings.