TUPAC LIVES ... on Chris Johnson's new cleats. 

The AZ Cardinals running back got some custom "Juice" cleats -- inspired by the 1992 flick ... featuring images of Pac, Omar Epps and the other two guys on the movie poster. 

We spoke with the genius behind the shoes -- Desmond "Skilz" Jones -- who says CJ2k plans to rock the cleats before and during Sunday's game against the 49ers. 

Skilz says Johnson hit him up and specifically asked for the movie-inspired paint job ... and it took him 10 HOURS to create the final product. 

Pretty sweet, right?