Security cameras captured him at the the store called "The Cyclist" on the 1700 block of Newport Boulevard in Costa Mesa.
Once inside the store he grabs a set of gloves and then walks away with one bike.
He then repeats the same procedure with a second bike.
The store owners say he threw a rock the size of a bowling ball to break the store window.
They say he got away with $8,500 in bikes and merchandise.
If you recognize him please call the Costa Mesa police.