Also i would like to say that I didn't even thinking of looking to see if mine had cracked. And also in the searrch to balnce them out I tried another tire brand and turn the tires aroudn the rima nd the balancing is still outta wack. When I balance them it just wants more weights. Some of them now have about 5-12 oz in weight to get them somewhat balanced. When i first got them it only took about 0-2 oz at most.