front bearings fairly easy....rear not so much. do front first. i ALWAYS remove the rotor just to be on safe side. forget the brass punch....something along the lines of a long tool steel punch....even a massage piece of rebar with flat faced ends works fine. insert thru either side till you feel the tip engage the opposite end bearing and smack it. a few of these and you should be able to move inner spacer. once you can move the spacer a tad it's just a matter continued hammering and bearing movement. i won't kid you...the rear w/o some sort of bearing removal tool or puller is challenging. if none available then remove both rotor and pulley, lie wheel on piece of cardboard on floor , and try the above method. it probably won't work due to the inner width of the hub. get out the dremel tool set and CAREFULLY notch one bearing outer race....just 1. then use the punch/hammer method and drive it out.