Give it time once you start running it hard they will go fast. Mine had flat spots after 7 tanks. DT sent replacements, I'm now trying to get another set from DT now. my last rear actually cracked in one day (4 tanks) and one of the front was almost completly gone.

I'm not going to run the truck myself until they come out with better ones. It's my sons truck he will run it and he won't be near as hard on it as I am.

I was also thinking of trying to find a replacement that matched, I don't have the resources or knolwledge to do that. I hope some of you veteran RC guys can help out with that. But then again why should we buy a replacement part to replace a defective part. i'm hoping DT comes up with a fix.