I'm not sure of the offset, when I ordered them the guy said it was about a 1/2 inch more offset than the stock wheels. I do have spacers ..1 1/2". I have heard different things about using spacers but I decided to order these anyhow. They are really a quality product. ...machined, very nice and strong. I've had them for about 4 or 5 months and they have been great. You definitely have to lift it or they rub pretty bad with the spacers. I was concerned about how true the wheels would roll with them but you can't even tell you have them on from the drivers seat. I've had the 4R off road a bit and they've held up great. The bar is a Westin. I really like the Jaos better but ....serious dinero! I'm considering welding some new tabs on it to put some lights up higher in front of the upper grill. Where in Denver are you from, ...I grew up in Wheat Ridge.