Like I said before I don't race so I don't care about a little extra weight.If I raced then of course I would go with carbon or keep it stock.All I do is run them in a school parking lot with my son so weight is not a issue for me.I will do the stock one in carbon come winter.To each there own but I like the aluminum and don't care about the added weight so do whatever you choose and I choose gpm parts.