Thank you for the information I did make a mistake in the listing and you are correct the factory wheels are indeed a 16x4 with the original part number being 599885, The main reason I put down just 16x4.5 is because 99% of the wheels I found out there are labeled that. It also depends where you measure in the bead area at the top of the rim it comes out like a 4.5 and at the bottom of the bead area it comes out closer to 4. But I want to thank you for your information and help.