Just bought new rims but still need tires please help

So I got some new rims today for a good deal but they did not come with tires. They are 18x8.5's the guy I bought them from suggested I put 285/65/18's on but I don't know if I will need a lift? So for people with (or without) 18's what size tire should I go with? I don't want a skinny sidewall and I mainly stay on pavement so I don't need something to aggressive either but I want to
fill most of the wheel well up.

Please help me out guys and all advice is welcomed.

 

You'll probably need a 3" lift to run 285's. Someone will correct if I am wrong.

 

Somewhere between 2.5-3" depending on how much trimming you want to get into. The size you are looking at should be equivalent to my 285/75/16's, and without trimming they will rub when turning full lock.

 

So what is the difference 285/65/18 and 285/75/18?

 

The 285/65/18 will be about 32.5" in diameter and the 285/75/18 will be dang near 35's.

 

Ok thanks for clearing that up for me I dont know anything about tires

 

Discount tire has a nice tire calculator:

http://www.discounttire.com/dtcs/infoTireMath.dos