These caps look great with the SS312 ITP wheels. However, the front wheel cap (all 4 are the same) gets lost very easily. This is because of the short offset of the front wheel in the outer side. In muddy or very rocky terrain, for sure you will loose one or both front caps.
Fortunately, these caps are relatively cheap and always available at Dennis Kirk.
Maybe the manufacturer could reduce one inch the height of the front caps (and even the rear caps - from time to time you loose or damage one of these), and this will reduce the risk of loosing the cap without affecting the great look of the wheels with these caps. Another option could be to modify the fit to lock them tighter.