Go with 4 20X9?

[Frupal]

Stock wheels are Front 20X 8.5 Rear 20 X 9. Is it OK to just put 20X9 all around?

[Opie55]

The "square" setup from the factory used the 8.5" at all four corners. The 9" was for the rear of "staggered" cars like yours. The 9" has a 44 mm offset. The 8.5 has a 33 mm offset. If the offsets were the same, the 9" would sit 1/4" closer to your suspension up front (1/2" wider, but half of that is on each side of the wheel centerline). But the greater offset of the 9" - by nearly 1/2" (11mm) means it will sit even closer - nearly 3/4". I doubt you have that much clearance to your struts. So while there may be a 9" that will work, I don't think yours will. Try one and see.

[Frupal]

Originally Posted by Opie55

The "square" setup from the factory used the 8.5" at all four corners. The 9" was for the rear of "staggered" cars like yours. The 9" has a 44 mm offset. The 8.5 has a 33 mm offset. If the offsets were the same, the 9" would sit 1/4" closer to your suspension up front (1/2" wider, but half of that is on each side of the wheel centerline). But the greater offset of the 9" - by nearly 1/2" (11mm) means it will sit even closer - nearly 3/4". I doubt you have that much clearance to your struts. So while there may be a 9" that will work, I don't think yours will. Try one and see.

Thanks for the great response. I called the tire shop and the guy promised that they would fit perfectly. 20X9 in front and 20X10 out back. So we'll see. I'm going with MRR GF5. If I hadn't just bought new rear tires, I probably would have gone with 19s. Also, since the car is going on 7 years old, they suggested I replace the TPMS sensors. Probably not a horrible idea. Going to decide over the weekend for sure. Pull the trigger on Monday. Fun Fact! These wheels are manufactured with solid centers. They are drilled at the factory to order. I did not know that!

[Opie55]

They will fit perfectly if they have the correct offset. I see from the ad you posted that these come in a wide range of offsets. What is offset they are recommending for your front?

[Frupal]

Originally Posted by Opie55

They will fit perfectly if they have the correct offset. I see from the ad you posted that these come in a wide range of offsets. What is offset they are recommending for your front?

The guy told me that they would be custom drilled at the factory for the 640. He assured me that the offset would match as well. I think the stock wheel offset for my car is 33 front and 44 rear.