Dude [>:] Get your facts straight before you post. Foams absorb shock from jumps and bumps and keep the tire from squishing down to the rim and also to build up the side wall of the tire so when in a turn the tire dose not want to lean on and roll on the wall of the tire. they also help with handling cuz they help stop body roll
I pretty much agree! And if you did not have the holes the vehicle would bounce too much and make handling worse. All so the holes are to let any water and dirt get out. I do not have holes in the wheels of most of mine but in the tires as this way centrifugal force slings the dirt and water out. Dirt really puts a hurting on the foams. Some put holes in both the wheel and tire.