BeZerK2112, I have never done anything about this to date. However, I'm approaching 100k miles in metro Detroit and am hoping to have an answer to this before the clutch goes. It feels fine so far, but if I end up needing a new clutch any time in the near future, I would love to put a taller final gear in. I'll keep on looking and will post if I find out something on it.
deo1929 - There is no speedo cable. It's all electronic. It may be possible to re-program the tire size, but I've got lowering springs on my car, so I can't go too much bigger.