I currently have some pretty worn-out Kenda tires that came stock on my bike. Today at the skatepark, I slid out and fell twice. Once was when I was just turning on flat ground because of a small amount of sand. So, could you guys give me some suggestions on some good, grippy tires? I ride mostly park and some street. I also would prefer for the tires to be under $30. I was thinking maybe a Fit FAF for the front and a Demolition Momentum for the back.