![Posted Image](http://op-for.com/lockheed-martin-mule-1007.jpg)
Now I know that that is probably not what you were thinking when you read the topic title, but check this out! Those aren't wheels...
![Posted Image](http://upload.wikimedia.org/wikipedia/commons/a/a6/MULE_ARV.jpg)
![Posted Image](http://img269.imageshack.us/img269/1552/multifunctionutilitylog.jpg)
This drives on freaking articulated wheel-legs.
It can lean in any direction and raise and lower its wheels to climb over obstacles, very similar to a six-legged insect. It's unmanned and remote-controlled, designed for recon and infantry support. As you can see, it carries a machine gun and a few ATGMs.
This ARV is literally a few more joints and feet away from being a legitimate spider-mech.