The Dirt Hawgs are renowned for longevity, especially on hard surfaces. You won't get much grip off road with them though.
If you want something cheap then these might be worth a look..
http://www.ebay.co.uk/itm/1-10-Scale...item3a808bf31e
I just got a set for one of my bashers, the foams aren't the best quality and the rubber feels on on the soft side of medium but i suppose you can't complain for the money.
However, if you are trying to learn the 2wd chassis behaviour, or find tweaks to improve its handling and performance then I'd recommend you do this with a tyre you think you will want to use longer term. No point adjusting for hard wearing dirt hawgs on tarmac if you are then going to race on a gymnasium floor or carpet on minispikes.