You can also use a large steel punch/aka drift from the local parts store. Yes Brass is better but I use steel with care. You'll wanna move the inner wheel spacer off to one side a bit and then catch the bearing edge with the punch/drift and tap it out. Heating the circumference of the aluminum wheel (the area holding the bearing in place) will help it fall out easier. And like AKXR4 said freeze the bearings for at least 20min, and heat the wheel really good. Then use a socket that is a little smaller than the outer bearing race, and tap it into place. The more temp difference the easier. If no sockets close enough use the best you've got and some large washers to cover the bearing. And also clean out the wheel well and then grease the wheel and outer bearing surface after taking it out of the freezer and the plastic baggy. When the wheels are heated really well and a frozen bearing used they nearly fall into place.