So I just got a Puch Luzern (that's been modified - upright handlebars and higher seat) ... but it's a lot of fun to ride, espcially because it still has all its orginal other parts. It is so light and quick, but the front tire doesn't hold air too well and I can't figure out what kind of tires I can replace them with. This is what is written on the rims: 16x622-700c (made in Belgium) ... Can anybody please give me links to websites where I can purchase wheels for this bike. I just checked out Sheldon Brown, but I am new at this so I am not quite sure what I am reading. I was also wondering whether I can put a kind of cyclocross tires on it or whether I should stick to road tires.