I bought a set of Ergon Grips for a different bike and had them laying around my office waiting to be installed. During this time it occurred to me that I loved the grips on my Tikit least of all the handle bar interfaces I own. So I threw the Ergon Grips on my Tikit instead. Having used them for a couple weeks now they get a hearty thumbs up. They are much more comfortable then the stock grips. Their claim to fame is that they give your hand a much larger surface area to spread the weight of your upper body and thus reduce the pressure on any one spot. I can report that they do indeed do this effectively. They also don't interfere with folding the bike.
You can get them in small and large sizes depending on what diameter grip you'd like. You can get a version specifically made to work with gripshifters and they also offer a version with an integrated bar end.
The only negative review I've heard so far mentioned they fade quickly in harsh UV conditions - think So Cal or Baja, but I don't think that affected their functionality - just their appearance. I liked them so much I bought a second set for another bike.
