here are several types of alloys, some with more merits than the other. The simple fact that a wheel is some sort of alloy does imply that it will outperform steel wheels in some form or another. Compared to their steel counterparts, alloy wheels are lighter. Aluminum, the base of many of these alloys, is a considerably lighter metal, and the additional metals that it is alloyed with, which can be nickel, titanium, or magnesium to name a few, are added to strengthen it. Besides their lighter weight, alloy wheels also transfer heat more efficiently than steel rims do. This means they can take a heavier braking load without warping or damaging the brakes.