7 t9182 I cant tell you what will work for you.. It seems that all of these cars are just a little different. I have offset trailing arms as well. but for 17 or 18 inch rims this should not matter and you really dont need them.
I ordered the rims and then ordered 8 different tire sizes. 295-45, 285-45 , 255-45 and 245-45 two of each,
Discount tire in my home town was very kind to get them all for me.
I did lower the coilovers about an inch front and back before we put on the new tires and rims.That was all I thought it could take without the bellhousing hitting the ground on my road. Iam overseas right now for about 3 weeks, but when I get Home I will mesure the bellhousing clearance to ground.
I got to the tire store and started with the largest first. When the 295-55 rub'ed a bit, we tried the 285.-45 ,but it just did not look as good. Almost the same gap as the 17 inch rims I had before. . So I opted to grind the frame a bit to fit the 295's.
There are a couple of wheel offset tools out there,perhaps see if anyone locally has one that you could test fit.
I really dont want to tell you that some combo will work or not. its really quite a crap shoot