WA
704 posts
http://cgi.ebay.com.au/Wheelbarrow-wheels-/260758296189?pt=LH_DefaultDomain_15&hash=item3cb667d67d
QLD
12365 posts
Our local mower shop has the same type of wheels with ribbed tread tyres for $35 ea.
When I asked if they could supply tyres alone they said no. I think the tyres and tubes might cost just as much but nobody seems to able to scource them.
WA
2775 posts
tyres and tubes can be bought from Mullins Wheels for about $16.00 for ribbed tyre and tube.
I think Mullins Wheels have branches Australia wide.