JC may have corrected the issue already so don't shoot the messenger, lol. The ones i have were the worse truggy wheels i've ever seen. Not only do they wobble like hell, 2 developed bad cracks from the center out. These were early release wheels so hopefully the cracking issue has been fixed. I run a losi. The proline 4.0 wheels work ok and the best standard(3.7")wheels i've used are associated truggy rims. No cracking, no wobbling.