you want mashers or masher 2000s? here are a few links of cool wheels. try to get some with a lot of offset so it will flex and handle better.
i run these on my race truck. very durable and have about an inch or more of offset.
http://www2.towerhobbies.com/cgi-bin...?&I=LXM876&P=0
http://www2.towerhobbies.com/cgi-bin...?&I=LXRD74&P=0
http://www2.towerhobbies.com/cgi-bin...?&I=LXMSY1&P=0
HPI and proline make great wheels. all those have deep offset too.