What is the name for these?

 

Not sure of the names but they came on some of the grand cherokees

 

Looks like a wheel off of a grand Cherokee/ Cherokee limited to me.

 

I know your not suppose to but could I put 33x12.50's on them?

 

You could. Prolly rub like crazy on your lcas without wheel spacers

 

How big of spacers?

 

Most lifts for larger tires usually recommend a min of 4" BS. Stock XJ wheels are approx 5.25" BS. So, at least a 1.25" spacer if not 1.5"

 

You'll need at least a 2" spacer if you do decide to put a 33x12.50 on 'em. It's not recommended that you put 33x12.50's on a 15x7, rim but it will work. Normally a 15x8 is good for holding the bead, but a 15x7 will work, just be careful when airing down that you don't go too low. Also, be sure to keep 'em at about 30psi for pavement driving so you'll have even wear.