Drift_Buggy.....Im thinkin its dry bearings and dry CVD's.....i would'nt reccomend opening up and trying to relube your bearings.....imo for the 1$ they are...its worth it to toss em.....Retro i find it hard to beleive that the 8x14's on the hubs have lasted 18 month's....give or take a couple race meets and the outter's are feelin gritty.....ive got a BAG o crunchy 8x14's over the last year or so....also i would'nt reccomend Grease or any type of lube that will attract dirt....as dirty lube will only wear the part faster....not prolong its life.....most guys rely on Dry Film Lube's....they come in an aerosol and are 100% Dry as to not attract any dirt.