Is it possible to purchase just the outer rim for the 19" SF Challenge? Got a small chip on one of the rims and want to replace it! I'd buy a whole new rim but if I could get just the outer portion then that would be sweet too.

 

I don't believe Volk offers separate hoops to buy. The wheels are also most likely 2-piece with the face welded to the hoop. Probably not going to be able to replace like you want.