Examples of wide-based robots using traction and omni wheels

[IKE]

In 2010, 2619 was a really great wide bot that did not get the attention it deserved. Here you can see t participating in a 12 to 13 match that was really a nail biter.
http://www.thebluealliance.com/match/2010gl_qm45

They are the blue wide bot that starts deep and works their way forward.

That year they used KOP (gray rubber) in the front, and lunacy wheels in the back (if I remember right). This robot was a lot scrappier than its relatively low traction system would have you believe.