James Harden -- GIVES NIKE THE BOOT ... Breaks Out Truckload of Adidas Kicks

James Harden finally kicked Nike to the curb ... and celebrated the 1st day of his new $200 MILLION shoe deal by backing up an ADIDAS TRUCK filled with shoes to his front door.

As we previously reported, Harden was still rockin' the Swoosh after he inked his huge deal with the rival shoe company ... which pissed off the people at Adidas, even though he was still under contract with Nike.

But now, it seems everyone got over it ... because Harden has loaded up his wardrobe with HUNDREDS of pairs of Adidas shoes -- which means no more excuses.

So ... think he's gettin' rid of the Jordans?