Originally Posted by
BRSracing
I had some in for two plus months no leaks and just as smooth as the day I put them in.
I have built two rm motor cars and two mm cars never had a ballcup issue and have never popped a ballcup off while driving.
Thanks, at 10 bucks a set I was looking at doing one X ring and one O ring for club races to save a little cash. Assuming the X rings swelled as bad as the O rings