Assertion: drive sprocket | /r/HasProperty | rear idler wheel
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text: Since the drive sprocket can be at either the front (M4 Sherman, many other WWII tanks) or the rear (T-90, most modern tanks) of the vehicle depending on the design, the idler wheel either carries the track back off the ground and returns it to the drive sprocket (rear idler wheel), or receives track from the drive sprocket and lays it down in front of the road wheels (front idler wheel).