Rims/Tires help!!!!

Hello,

I just recently bought my 2011 extended cab 2500 4x4. Its summit white/black running boards. I cannot afford to spend $1700 on a lift kit. What are the biggest rims and tires i can fit safely without using a lift kit. If you have this setup and are willing to share your specs or suggestions i would greatly appreciate it. I am looking to get this this weekend on the during the week.


Thanks alot for all your support!!!