I need a lot of help please! I have a 2004 chevy blazer 4dr. 4wd. I have found some black fuel revolver wheels. They are 15x8 with a 5x4.75 bolt pattern and they are -18mm offset. I'm not sure what the backspace is. I am running 31x10.50/15 mud tires. I'm not sure if they will fit or not. I posted a link so you can take a look at them! Thank you for helping me!

15x8 Black Fuel Revolver Rims 5x114 3 5x4 75" 5 Lug Jeep Ranger Ford s 10 CWO | eBay

 

If memory serves me, the offset for the 4wds is about 6" on a 7" wheel. I don't think the ones you listed have quite enough offset.

 

yeah I think you're right I do believe that it is 6" but I think that is the backspacing. I think the offset is supposed to be -12mm