Hello again guys, I need help. When I purchased my (New To Me) car, it came with 4 snow tires. I just took a closer look at them, and all all 4 are 245/40/18's. Now my concern is will they fit on the rear with my stock 124's?

If not, I'll have to purchase 18's just for my winter wheel package.

Thanks again.

 

Find out what brand they are and go to the manufacturer's website. Look up the tire and check its specifications - they should state what width of rims that the 245/40/18 will fit on. I suspect that it will work with 8 and 9 inch wide rims. I have 245's on 8 and 8.5 inch wide rims and they don't look stretched.
Mark