Moving to 28's. Mabey stiffin up front wheel feel due to shorter contact patch. Front now very flexy at speed's above 45, will also give bars a lighter feel, hopefully not twitchy, and more rim protection, although these wheels are very tough (Rolf Vigors) running Michelin Krylon 25's @ 110psi., very long lasting, and the bikes ridden 10 times a month,zero flats. Mabey the 28's will be faster! BTW, the Michelins are very comfortable, but the new ones, at least the Pro Race series are made in Thailand