Preface: I started writing this post in response to this thread but got carried away and it turned into a general Sol/Sky wheel fitment guide.
I have been doing some research recently to try and find some new wheels for my car. Here is what I have collected so far from other posts on the Forum.
You are better off finding a company that will custom make wheels in our bolt pattern than trying to find a off the shelf choice. Forgestar | The World's First Custom Rotary Forged Flow Formed Wheels
seems to be a common choice for people looking to upgrade wheels.
Unfortunately custom made wheels are expensive. If you can't swing the $$$$ for a set of custom wheels the next best choice would be to look for a similar bolt pattern wheel and have them redrilled. Some manufactures will offer this service for an additional charge if you just contact them. There are two members on the FB group that have had the Avid.1 AV-52 wheels redrill when they ordered them from www.aspiremotoring.com
. These wheels are much more affordable than custom wheels. If the manufacture or dealer won't redrill them there are some places online that offer a special redrilling service if you send them your wheels. Felgen Meister Wheel Re-drilling Service - FM-Wheels.com
Some members have bought new hubs and had them redrilled to a different bolt pattern but I don't really like that option because there is a high up cost for parts and machining and then every time you change rotors you are going to have to get them redrilled to the new bolt pattern also. This only seems like it would pay off if you wanted to change wheels offten.
Ok, now for what exactly fits on our cars. I don't like using offset to determine where a wheel is going to fit in the wheel well because offset is determined by wheel width. Instead I like to use backspacing. It is the same no matter how wide the wheel is. So now we need to determine what is the most backspacing a wheel can have and not hit the frame/suspension arms.
My new wheels
In this post Roxer shows the clearance between the rear upper control arm and his new 18x9.5 +43 Forgestar F14. Judging by that picture I would say that +45 offset would be the a absolute maximum offset for a 9.5" wide wheel. Now I use this converter Converter - CCWheel
to show that that +45 on a 9.5" wheel is 7.02" backspacing.
Lets not just take one persons word for it. Lets look at another example.
In this post shabby tells that a 18x9 +55 rubbed and a 5mm spacer was used to change the offset to +50. When we use the converter we find out that +55 on a 9" wide wheel is 7.17" backspacing and as we determined earlier that is to much. +50 on a 9" wheel is is 6.97" backspacing so it will work fine.
So using 7" backspacing as the maximum here are the highest offsets you can have for each width.
+63 on a 8" (6.98" backspacing)
+57 on a 8.5" (6.99" backspacing)
+50 on a 9" (6.97" backspacing)
+44 on a 9.5" (6.98" backspacing)
+38 on a 10" (7" backspacing)
+31 on a 10.5" (6.97" backspacing)
+25 on a 11" (6.98" backspacing)
Keep in mind anything wider than 9.5" is going to stick out past the fender. If you want to use 9" wide wheel or less use Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit
to determine the offset you need to get the wheel close to the fender. For example the face of a 9.5" +44, 9"+38, and a 8.5"+31 will all be in the same spot.
19x9.5 +45 Fast Wheels FC04A
If you haven't read these two thread I would recommend it for anyone who is looking to buy new wheels. There is a ton of conflicting information in them. If there are no pictures of the fitment posted I take it with a grain of salt. The 2 main points to take away from those two threads. With 19" or 20" wheels you can get away with more backspacing without rubbing. On some wheel designs the hub center and rear axle may stick out further than the face of the wheel.
Another thing to note is I still have the stock wheels on my car and have no experience with new wheels. I am only going by what others have posted.