Mountain biking is becoming a big part of New Zealander's outdoor enthusiast culture with more and more people getting out there and exploring single track all over the country. Locals love it, tourists love it. If you haven't had a go, maybe the time has come so you don't get left behind.
Radio New Zealand just did a show on mountain biking in New Zealand and its affects on the local economy. If you have a few spare minutes it's worth a listen.