ive jus upsized my ikon 1.6's tyre. i moved from the stock 175/65 R14 ZVTS to 195/ 60 R14 as the difference was jus about 1%. i got a set of Yoko ES 100s. great tyre and i do like the improved ride, but i jus saw your post which said 195 60 is not recommended on the Ikon as it will scrape on the inside.
i donot really get any noise from the tyre, but will double check. is it better i get them changed?