I had foot surgery three weeks ago so I had to stop walking the dog. Beacuse my doctor said that I could ride a bike as soon as I felt capable my wife bought me a new one for my birthday. The first few days I got on the bike and took the Chihuahua up and down the dead end, just to get her use to the pace and turns. Last night we actually made a full block (I went on my full ride after I brought her home). I stopped once so she could pee and sniff. The only real issue that we had was that she is scared of big dogs and tried to run to the wrong side of my bike when one started barking from it's back yard.

10 - 15 KM with a boston terrier , I would plan on having a basket or back pack for it to ride in when it gets to tired to run, they have short legs.