BMX Biker T.J. Lavin -- Shreddin' With The Troops ... In The Middle East

T.J. Lavin rides for America ... literally ... 'cause the BMX star and host of MTV's "The Challenge" is overseas putting on a two-wheeled show for the U.S.A.'s bravest warriors.

T.J. and a group of riders including Ron Kilmer, Morgan Wade, and "Catfish" Zack Yankush are tearing it up in the Middle East for their "Bikes Over Baghdad" stunt tour.

TMZ Sports spoke with T.J. and he says the tour -- which travels to top secret "undisclosed" locations -- is all about "bringing some joy to the men and women serving our country in harm's way."