You should replace runners when you've run around 1000km in them, but what to do if they're in no state to send to St Vinnies? Answer: recycle them into bouncy sports surface material via Nikes Reuse-A-Shoe scheme (and no, they don't have to be Nikes - all athletic shoes are accepted).

Reuse-A-Shoe: Drop-off Locations in Australia

WA
Nike Factory Store Perth
440 Hay St, Subiaco 6005. Open 10am-6pm daily. Phone: (08) 9481 7140

QLD
Nike Factory Store Queensland
Harbourtown Shopping Centre, Cnr Brisbane Rd & Oxley Dve, Biggera Waters 4216. Open 10am-6pm daily. Phone: (07) 5528 9766.

NSW
Nike Factory Store Sydney
126-130 Parramatta Rd, Auburn 2144. Open 10am-6pm daily. Phone: (02) 9648 4791.

VIC
Nike Factory Store Victoria
416 Smith St, Collingwood 3066. Open 10am-6pm daily.

Or you can send any number of shoes to Nike at: Nike Recycling Center, c/o Reuse-A-Shoe, 26755 SW 95th Ave. Wilsonville, USA. (Nike will not accept shoes delivered with postage due)