Thanks for the opinions! Although I appreciate all of them, I would like to note, that the carriage isn't just something cobbled together - it IS professionally made, just antique.
Let me explain the situation - carriage driving was important in Latvia up to the early part of the 20th century. There weren't any competitions in driving back then (apart from some harness racing, I suspect), but driving was an important means of transportation with horses. Carriages like this were used, and the same methods were used to build sulkies and other models. Then the wars and next the Soviet times came and pleasure driving was disregarded as being useless - instead it was replaced with driving for strictly practical means - so only farm carts were generally used by the common folk.
That continued for a couple of decades. Now, just before 5 or so years, carriage driving started re-appearing, instead of just a smaller number of drivers who supplied pleasure rides for tourists and such. Even so, carriage drivers are a minority among the horsey part of our nation. Thus the market for new, professional carriages is small and ridiculously expensive. One is either really rich to get a new one (which I am not), either drives a farm cart (which I don't want to invest in) - those look like this:
, either gets their hands on one of the antiques. For example, something like I have been eying. And even so, the market is still very small. I bet that there are carriages that are far more comfortable, however, ones like this have been driven around for a long time and you really don't hear anything about any accidents happening, unless there is a drunk driver involved.
The main question was - what are these things like regarding the comfort of the horse and the wooden wheels vs pneumatic wheels. Re that - thanks, churumbeque, I really hadn't considered it as low, but I will take a very close look if I come to visiting the owners and seeing it!
Inga, that carriage is certainly something beautiful - I'd love to get my hands on something like this. :)