Hola Fernando,

basically all has been said by ther others. Just one more thought on the issue of "buying a bike". Online-dealers like www.canyon.de sell for very reasonable prices (no. I'm not advertising nor working for them... ) This bike for example http://www.canyon.com/mountainbikes/index.html?b=64 costs like 500 Euros and technically is way ahead of what we used to ride in the early nineties. And our bikes where almost high-end, MTB racing material then... What I'm trying to say is, a decent brand(!) name bike will not let you down. Quality is too good these days. Just don't buy any trash from supermarkets or the likes. It's not worth it at all.

Que te lo pases genial en Holandia,

Björn