Would I be able to fit 20" KMC rockstar rims on a stock 2011 xB? Without rubbing or any problems and what tire size would I need? Thanks for the help.

Brand: KMC XD-SERIES
Model: Rockstar Car

 

20x8 +42 offset with 235/30-20 tires. Absolutely no rubbing at all at stock ride height, or even with a mild drop.

 

Thank you. I was told here locally that I might need "spring locks" never heard of them just wanted a second opinion.

 

Second question.. and sorry im a complete noob when it comes to rims and tires. I found the KMC Rockstar rim. But now that you refer to +42 offset where would I find this? and I think the rim is a 20x10.

 

They're available in 20x8 +42, 20x8 +32, and 20x10 +35.
The 20x10 will poke out past the front fenders 3/4", so you want the 20x8.
Also, the 20x10 weight a lot more, and will crush your mpg and acceleration.

 

I got it... Thank you very much for your help Cionide!

 

Cionide... I have to bother you with one more question my tire pressure monitoring system will I be able to change them into the rockstar rims? I have enkei rims right now with them installed came like that from the dealer...

 

I would think so, but I've never dealt with KMC wheels personally, so no guarantees. I suggest you call KMC or one of their authorized dealers for the answer.

http://www.kmcwheels.com