The Jam of Mainhattan is back. This time in the fourth edition and probably even bigger than before. For those who don't know it yet, the concept is simple: skate streetspots and get cash for tricks. Never change a running system. As usual, it's NikeSB and Bonkers who are sponsoring the whole bum, so get ready for generous rewards. If you're as excited as we are and you can't wait until 15.09.2019, satisfy your desires with this recap video from last year.