My old '05 Sirrus had PB Hybrid fenders,which would fit 38's under them. Don't know how much the design has changed since then.
Best way is to try to see what size fenders will fit. Try going to a bike shop and see if they'll let you slide a set between the forks and rear triangle to see what fits.
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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,Dahon Speed Pro TT,Brompton S6L/S2E-X
