im in the middle of getting my lift done and i bought crome rims and i dont want to run them in the winter so im wondering how big of tires i can put on my stock rims. they are 18" fx4 rims. i dont know how wide they are, that is pretty much why im asking. i was looking to go 35" tires for these.

 

They are 7.5", which is a little narrow for a 35" tire. Check the tires specs.

 

you can put on a 35'' tire, however, what is the exact size of the ones you are looking at?

 

You can run 35x12.50-18 tires on the oem 18x7.5 wheels. Several members are doing it with no problems. Just make sure your lift allows you to run the oem wheels.