I think this is one of those 'your experience may vary' deals. I have not had any issues with my wheel adaptors - and I've wheeled and drove on them for 1.5years now, like many other modified XK and WK's on the road. Not that I have a +4" lift - but once you start applying larger said lifts, you MUST have more backspacing, it's obvious. When the recommended backspacing for +4" lifts, especially for a wk, is 4.0" - the only viable options to achieve this is with wheel adapters.