there is a class of riders for those of US over 200#. its called clydesdale. to say that being 230# is the problem only invites trouble and shows a lack of knowledge.
what type of tire are you running? I notice when I ride with a thinner walled tire , like a race tire,I feel like the rim is hitting every bump even at 45 or more psi. I have started riding a thicker wall tire( Panaracer Cinder) and only feel the trail if Im below 25psi now.