cr0ft
Living Legend
If you do a lot of computer/keyboard work for instance you may have issues with your wrists and the carpal tunnel where all the nerves and tendons to your hand goes. The stock bars on my R3T caused major deviation from the relaxed hand position and I would start having issues with numbness after a while. With risers and the bars turned down sharply I got a much nicer hand position. It may not be vibration related at all but hand angle related.
http://ergonomics.about.com/od/glossary/g/defnaturalwrist.htm - the further you're deviating from that, the worse any carpal tunnel or repetitive strain issues will be.
http://ergonomics.about.com/od/glossary/g/defnaturalwrist.htm - the further you're deviating from that, the worse any carpal tunnel or repetitive strain issues will be.