Hi Guys, here's a video of our new Synchro wheel we just released. This wheel is made up of 3-piece step lip concave construction. As you can see in the video it shows both our shallow concave profile and our deep concave profile. Typically we use our shallow concave profile on front wheels and our deep concave profile on rear wheels. For more information or to see more images click here www.bozeforged.com/synchro.html.