Ford,2013 Explorer rims on my 2003 Explorer

I just put 2013 explorer rims on my 2003 limited explorer and wanted to make sure I didnt screw up.

The 2003 had P245/65/R17 and the 2013 are P245/60/R18. Everything fit and drives good but wanted to make sure there will be no long term issues. I know I should have researched this first but after reading a few places I figured I should check.