Originally Posted by hokiefyd

I understand that the IsoZone bars have a scalloped-out profile which works only with Trek's proprietary IsoZone grips. Trek sells an IsoZone bar end adapter (link here), but I don't know how that works or if it could also be used to adapt traditional grips. It looks like it includes a plastic filler to return the handlebar profile to circular. Additionally, I think I've read that some owners just use normal (lock on) grips and tighten them down so they don't twist.

M Rose it may be helpful or instructive if you could just remove one of your IsoZone grips and take some pictures of the bar so we could see what it looks like. It may become clear what is necessary, if anything, to adapt other grips to the bar.