Originally Posted by EricDrost (Post 1521721)

Agreed!

http://www.robotmarketplace.com/products/BPDWC22.html

Would be my choice. Pneumatic will likely be better, but in a pinch, I'd go with Colsons.

Originally Posted by matthewdenny (Post 1522013)

Any suggestions on how we could go about mounting the pulleys onto those wheels?

Originally Posted by Knufire (Post 1522025)

Dead axle hub: http://www.vexrobotics.com/colsonhubs-g.html

Originally Posted by de_ (Post 1521709)

Have you checked whether the larger 8" wheels will collide with the front and back "C" frames ? If so, is it possible to notch the frame to accommodate the extra 1" wheel radius ? Else you have to move the axles and then the belts don't fit.... :( Or extend the frame :(

Also keep in mind when going from 6 to 8 inch and not changing any gear or belt pulley ratios, the robot will go slightly less than 8/6 times faster. Though your driver does has a "throttle", it might be somewhat harder to control the robot in close in maneuvering. And the robot will have 8/6 less torque (in a pushing match).