Sek-m, even people who speak good english often don't understand trendy terms like "rolling the fender". When people modify cars, they often want the wheels to fill up the fenders as much as possible, they like that look. To get these wheels to fit, they often use a special designed roller to press the fender lip as flat as possible.
http://www.sportsimportsltd.com/fefl...te=google_base
Rolling will get you around 5mm of space. You could actually cut the lip off which would get you more like 10mm of space. Trimming the fender liner helps some rubbing issues also. The other option is to have the wheels machined to increase the offset.
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