Where did you get the idea that all europeans are small? The gene base for the caucasian population in the US is mostly the same as in Europe. Burger King, McDonalds etc. are popular here as well, so we have many of the same lifestyle problems the US population have (I assume you are from the US).

Hulls with more volume will support more weight. Top teams weight in at around 150-160kgs, but this varies a lot. At 185lbs you are at target weight.