I have a 2006 RKC that the rear spokes will not stay tight on. The shop has looked at the wheel and tightened them a few times now and they keep coming loose. They've been tightened 4 times. I've lost all faith in the wheel and have decided to just buy new wheels. I've run a cross some wheels from an '07 Ultra Classic. I'm pretty sure these will fit my '06 RKC, but wanted to confirm with the knowledge here before I purchase the wheels. Right now I'm just going to replace the rear wheel while I save up for the wheels I really want. Should these wheels fit?