I am getting close to finishing building a cross bike for my wife. I bought a Planet X Kaffenback steel frame off ebay and am using a mix of new and used Shimano components to build it up. I knew there was not much clearance between the seat tube and rear wheel so I bought 700x30 tires for the bike (Michelin Jet) - but it still looks awfully close - see picture. Being a newbie to cyclocross, I assume this could be problematic, but I don't know for sure. My wife is mainly going to use this for rails to trails type riding, she doesn't see any racing in her future.
Any recommendations for different tires, or should I just see how these ones go?