English

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a tractor with a retrofitted roll bar (1)

Alternative forms

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Noun

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roll bar (plural roll bars)

  1. A strong U-shaped bar fastened to the frame of a vehicle, such as an off-road vehicle or a race car to protect the driver and passengers from being crushed in the event that the vehicle rolls over.
    • 2002, Bobby Alvarez, Ghost Runner on Second[1], page 163:
      Once the two left wheels departed the surface, Travis knew he was in for trouble. Since there wasn't a roll bar on the SUV, the roof was probably going to collapse on his head when it contacted the asphalt.
  2. An anti-roll bar.
    • 2004, Jonathan Noble, Mark Hughes, Formula One Racing For Dummies[2], page 65:
      The roll bar is a metal bar linking one side of the suspension to the other. It limits how much the car rolls during cornering.

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