hey I know this is a pretty old post but I was looking for some posts on the internals because my shop just started to carry them. I mounted a set and tested them to make sure and loved the design. they are a little pricy just for an intertube, but the shipping from austraila to the us is what jacks the price up so much, besides, you're getting a double beadlock that is a complete sleeper and can be transfered from one wheel to another if you cange your bolt pattern for under $200. This means if you go out and bash your lip againes a rock not only will the stauns get you home, but all you'll have to do is replace the $50 rock crawler, not a $250 beadlock wheel. You can look at them on our website at
http://www.performanceoffroadcenter.com/oscommerce/index.php?cPath=190_472