Theres a big problem to race with aluminum wheels. I went to open-practice with aluminum wheels, and one of my wheels broke off (except locknut part) a clean circle cut out, after i just hit a side of the track. And to top that, my friend, who went to the open-practice with me had the same thing happen to him, the same way, just a different side of the wheel.
You should just leave aluminum wheels for show, and use some normal wheels for racing. Those aluminum wheels costed me $13, and i had to throw them away, while some cheap plastic wheels i use now for my racing tires cost only 5$. Just remember not to race with aluminum.