Well, I own an S3 right now, and I’m thinking about refit my wheels to aftermarket wheels.

The problem is that all aftermarket wheels that I prefer are really big wheels.

I'm afraid that those big wheels won't fit, what if they scratch the fenders or brake calipers?

So I search on the internet that there's an example of RS5 being modified, that it won't be any problems of scratching between wheels and fenders, or wheels and calipers.

Is there anyone who has installed wheel spacers on S3？And what’s the size of wheel spacers that I should put on my vehicles?

Thanks for your answers.