Going 2 sizes smaller on the SRT, thoughts?

http://images.google.com/imgres?imgurl=http://img179.imageshack.us/img179/5112/img0192hr3.jpg&imgrefurl=http://www.cb7tuner.com/vbb/showthread.php%3Ft%3D64233&h=336&w=448&sz=46&hl=en&start=11&sig2=3fq60aMhb3dCaQubyjHFjA&tbnid=QsQFsPm6jFQzmM:&tbnh=95&tbnw=127&ei=yBTQR9DpE4aWigG8vLVq&prev=/images%3Fq%3Dbroken%2Brotas%26gbv%3D2%26hl%3Den%26safe%3Doff%26sa%3DG

http://www.iwsti.com/forums/tires-wheels/102217-rim-experts-please-help-3.html

and its not that they break, its more how they break.

Hence why I also stated what ever has the better tire selection, but do not put this directly on a weight savings as the reason to go to a 15 inch rota