Cake is a 10" round on the bottom and an 8" round on the whitewall tire. Just tapered the top and bottom a bit of the 8" and put it on a 7" board and then used a dowel, to make tire impression marks. Cake is covered in MMF. I made black MMF for the first time and it came out perfect! Harley Lady is made out of gumpaste. Flames are hand painted on fondant. TFL