Truck tire tread with decoupling void and associated decoupling void sipe

A tread for a heavy truck tire that has a width direction, a thickness direction, and a circumferential direction, comprising:

• a bottom surface;
• a shoulder rib having a shoulder rib upper surface;
• a sacrificial rib having a sacrificial rib upper surface, wherein the sacrificial rib is located outboard from the shoulder rib in the width direction;
• a decoupling void that is located between the shoulder rib and the sacrificial rib in the width direction, wherein the decoupling void extends in the thickness direction;
• and
• a first decoupling void sipe that is in the shoulder rib and that opens at the shoulder rib upper surface and that opens at the decoupling void, wherein the first decoupling void sipe extends in the thickness direction, wherein the first decoupling void sipe is closer to the bottom surface than the decoupling void is to the bottom surface in the thickness direction;
• a second decoupling void sipe that is in the shoulder rib adjacent to the first decoupling void sipe in the circumferential direction, wherein the second decoupling void sipe opens at the shoulder rib upper surface and opens at the decoupling void, wherein the second decoupling void sipe extends in the thickness direction and is not closer to the bottom surface than the decoupling void is to the bottom surface in the thickness direction;
• and
• a third decoupling void sipe that is in the shoulder rib adjacent to the second decoupling void sipe in the circumferential direction such that the second decoupling void sipe is between the first and third decoupling void sipes in the circumferential direction, wherein the third decoupling void sipe opens at the shoulder rib upper surface and opens at the decoupling void, wherein the third decoupling void sipe extends in the thickness direction, wherein the third decoupling void sipe is closer to the bottom surface than the decoupling void is to the bottom surface in the thickness direction.