Performance has a set of knock off Ergon grips that don't have the aluminum clamp thing that work good on the trekking bars. (they used to be all black, I don't like the red much). I couldn't get the Ergons far enough out on mine to get the brake levers and shifters on and be comfortable for me. I also did a double wrap of cork tape along the rest of the bars.

http://www.performancebike.com/bikes...72_-1___000000