Brake rotor thickness measurement gage

Gage for measuring the thickness of a vehicle wheel brake rotor without removing the wheel from the vehicle, wherein the rotor brake assembly is spaced from the wheel to form a predetermined space, the gage comprising an elongate bar defining a gage axis;

• an elongate support arm extending outwardly from one end of said bar along said gage axis and having a free end at a point remote from said bar;
• measurement and display module means slidably mounted on said bar for providing indications of relative movements of said module means on said bar;
• an elongate anvil arm one end of which is mounted on said module for sliding movements therewith, said elongate anvil arm being arranged along a measurement axis offset from and substantially parallel to said support arm and said bar;
• a first anvil mounted at the other end of said elongate anvil arm;
• a second anvil;
• support means on said support arm extending in the direction of said measurement axis and having a support portion arranged on said measurement axis for supporting said second anvil along said measurement axis, said second anvil having a pointed end pointed in the direction of said first anvil, said support means having a dimension between said gage and measurement axes to permit passage through said predetermined space, whereby said second anvil can be inserted between the wheel and rotor and placed into contact with one side of the rotor without removing the wheel and the thickness of the rotor can be quickly and conveniently measured to determine wear at a plurality of rotor positions by placing said first anvil into contact with the other side of the rotor.