electric scooter drives & wheels for robot ?

Has anyone ever used the electric scooter drives & wheels for robotics ? I saw one in the mall today for about $100 and it seemed
like a bargain given that you get 2 wheels + drive unit. The front and rear wheels were different sizes, though. It was a "Razor" brand. The rear wheel seemed perfect for what I want - just the right size and "tackiness" - with built-in mounting points for a sprocket or pulley!
So now I am on the (internet) hunt for replacement parts to see if they are within my budget.
Anyone know how noisey the motors are ?
All comments are welcome! JCD
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You may like to check the following URL http://www.oatleyelectronics.com/motors.html
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