Diamo 17 inch Rims for Cars - 29 Karat Rims The 29 Karat has a sweet dual finish with a black finish that has five machined spokes that highlight the shape of the 29 Karat rim from Diamo. The machined part of the spoke lands at the end of the wheel, but the black part behind it lands on the middle of the barrel, giving a generous lip for the size of the 29 Karat.