Changing tire size only really has an effect if you change it by a large amount,say by going from 38's to 28's. Tread pattern,air pressure,and tire weight will have more of an effect on handling than a couple mm's of width.
What tires are you running now?
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Brompton S6L/S2E-X/M6L-X/S12 T Line
