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They have had them for several years. Most cars in the field have them now. There alr also covers on the rear wheels as well. Their original ones did not have the spoke graphic. Their wheel sponsor, BBS, got a little hacked that no one could see their wheels/logo. A few races later the graphic was there. The covers are attached to the wheel nut somehow.
The covers also have to do with how the brake cooling ducts work. Audi used a weird wheel design on some of their rally cars in the '80's.
Don
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