Might want to measure the inside width of the rim. A 28 is a little wide for a 13mm-wide rim, as I learned once to my regret once upon a time. Iven if it clears the frame and the calipers, there's a lot of slop in the handling of a bike with too-wide tires.
RichC
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Training: 2002 Fuji Roubaix Pro (105 triple)
Commuting/Daytripping: 2001 Airborne Carpe Diem (Ultegra/XTR, touring wheels)
Commuting/Touring: 2000 Novara Randonee (Sora/Tiagra/LX, fenders, lights)