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Yes its definitely a 40 hub , the sleeve 68-1236A 3.120" OD is for a 34 hub ,this sleeve presses into a 34 hub and then you use the 68-1225A roller bearing , this sleeve is to big in diameter to go inside my 40 hub which measures 2.840" OD , yes this bearing runs directly on the hub surface , Ive tried a few suppliers in Australia but they only carry the sleeves for the earlier hubs , i will probably buy new replacement hubs and use my l standard size drums