It's my understanding that certain items are not covered under the warranty, Wheels, Tires, Clutch to name a few. Although the dealer usually offers a separate warranty for tires. If you blew-out your sidewall, that would be covered under this policy. If you did not purchase the Tire Warranty, you're up the creek and the sidewall blow-out could have caused the crack in the wheel if you hit hard.

Sounds like a tire issue, not a DC issue...

I have not heard of any "CRACKED" wheels on the Crossfire, but it has happened before on other forged aluminum wheels, perhaps you got a bad wheel, but more than likely, it was a tire related problem. You should take a series of photos showing the bead side of the wheel, proving that you have not run into curbs, causing the cracks and also take photos of the sidewall failure. Then contact the DC regional office and forward the photos to the tire MFG. This may help your case...