My 2001 has 750 miles. OEM tires are in excellent shape, have never sat flat. The OEM tubes hold air great, never varying more than +/- 1lb over 3 months timeframe. But I've heard tubed tires can create catastrophic wipeouts at speed. And I have no idea if age (at 10 years) is a big deal. It's not trivial to change them out, so I'd take comments and especially appreciate real stories if it's happened to you. Do these things go BLAM! and flat in microseconds? Or do they let out air slowly?