I came to conclusion this was false statement - Lupo is made for 22inch tires (diameter), all follwing tires are 22inch:
175/65 R13
155/65 R14
185/55 R14
195/45 R15 (21,91", OEM Lupo GTI)
195/40 R16 (22.14")
23" tires (like 185/55 R15 and 195/45 R16), without special modifications, will occasionally rub.