In reply to More-On:
My three pairs of TX4 have all had the side wall rupture at the same time as the sole wore down to the blue midsole. So absolutely no point in resoling, as the uppers were shot, too.
I am quite light on my feet, so maybe other people have soles wear out before uppers?
The lacing system on the TX5 is rubbish compared to the TX4.
A TX4 with a TX5 sole would have been perfect, though the uppers would probably have died before the thicker sole unit...
Oh, and mesh on shoes? IME, it lasts about five minutes. The abrasion from rock, and abrasion against itself as the shoe flexes, wears holes in, well, maybe a bit more than five minutes, but way, way before any significant wear to the sole.
Post edited at 12:20