Abstract: An auxiliary locking brake for tandem tires is formed by upper and lower wedge members centrally joined by a threaded shaft moving the wedge members toward and away from each other for impinging confronting thread surfaces of tandem tires when disposed therebetween. Telescoping members adjustably extending between panels forming the wedge members permit fore and aft adjustment of the spacing between the wedge forming panels prior to installation of the locking device on the tires of a particular vehicle. Tire retaining flanges on the wedge members prevent lateral movement of the device in a direction parallel with the axes of tandem axles.

Abstract: An exterior brake for tandem tires having upper and lower wedges joined by a bar threaded to the wedges. The bar is rotated to move the wedges together and apart and is locked against rotation by a padlock extending through a lock tab on the bar. The upper and lower wedges fit in wedging engagement between the upper and lower tread surfaces, respectively, of tandem tires. Tire retaining flanges and a tamper prevention skirt are provided on the wedges. Expansion pads to adapt the wedges to tires spaced further apart are also provided.