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Originally Posted by Jeffel
treads are slow and they suck for quick turning and overall they suck and casters are horrible too. Its better to just use 4wd!
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treads can be very fast and easy to turn if done correctly. We have a robot that is by far the fastest we have built and he uses treads. conversely, one of our 4wd robots was terrible at speed, and could barely turn (it used a wonderful "Bounce turn"). I believe that treads work better than 4 wheels in many cases.