http://www.michelinman.com/tire-care...artire-change/
Printable View
Height is a function of suspension travel. Lowering (i.e. change in height) changes where your suspension is biased thus changing your static camber. And camber doesn't affect tyre wear anywhere near as much as toe - which is also affected by suspension travel, but not too much, the honda double wishbone is pretty good.
New tyres front or back it doesn't matter, there are scenarios which could cause problems for either (new tyres on rear won't help your wet braking very much), all of which can be avoiding by slowing down in the wet, especially around corners.