Today we're going to review part number 8605101. This is the Demco Surge Brake for Disc Brakes. This is a bolt-on installation and see the mounting holes. There's two on this side and there's two on the other side, and this would apply our install onto a 3-inch wide straight tongue trailer. A 3-inch wide is the inside measurement right here. The mounting holes, they have a measurement from… see more >