Sub $15 DC Motor and budget wheel recommendations for college project

Other Hardware Motors, Mechanics, Power and CNC
1

Our robot so far:
-Will not weigh more than 20lb and in fact, may weigh even less.
-Doesn't need speed. It just has to roll when told to do so.
-This is for a freshman engineering design project that is really just an introduction and not serious robotics or engineering.

What we are looking for:
-Sub $15 DC Motors
-Cheap wheels of preferably 4in diameter and up.

Recommendations preferred but advice along with recommendations is appreciated.

What is your opinion on these geared motors?

2

From my experience your not going to be able to push a 20lb robot with dollar store motors. This link might help you find some good motors.

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

3

How about a gear motor with an integrated wheel?:

They might be a tad slow for your needs (especially @ 12 VDC) - but as someone who has bought a few in the past, the "wheels" are fairly rugged (at least for an indoor, non-carpet rover), and the torque is really good, even at 12 VDC.