I am already planning my new rims for the summer, although it will still be a few months because of the norwegian west coast winter... My S-line has 225/45-17 summert tires on the stanard 17" s-line rims. I am ordering the Eibach Sportline which will lower it to about 45mm or another 20 in my case, cause of the s-line being 25mm lower than standard. I'm a fan of wide and low cars since i currently own a VW Polo mk4 lowered with coilovers and with 8x14" rims. So i am thinking of buying some rims on ebay.de or from ebay.com. Here are the wheel tyre combos i have been thinking about. I want to try and get some stretch in the tyre so the rim can stick a bit outside the arches, while the main tyre surface is well within. 8.5x18 with either 215/40-18 215(or 225)/35-18 8.5x19 with 215 or 225/35-19 According to this tyre size calculator going to either 215/40-18 or 225/35-19 is going to be within 1% of the old setup. But since the s-line wheels are 7.5x17 and the new ones are 8.5x18/19 the extra rim width will stretch the tyre so it will be even more than 1% off, right? For example my 8x14 rims on my polo will run "faster" with 195/45-14 than 7x14 rims with the same tyre profile, because the tyre is stretched more and the circumference then because shorter. Anyways. Any recommendations you can give me will be helpful!