Do any of the Ergon grips with bar end allow for a handlebar mirror? If not, what is a good solution for bar ends with a mirror? I've tried the helmet mirror and prefer the bar end mirror. Surely there's a good solution. Thanks.

The GC2 uses an internal plastic plug in the end. Because of this, you can position the grip slightly inboard on the bar, thereby exposing a short section of bar for an external clamp. Or you can leave the plug off if the mirror uses an internal mount. The GC2 appears to be Ergon's only grip with this design. However, the bar end on this grip may be shorter than what you want.

So now I'm thinking... if I had the GC2s and a bar end mirror, would I be able to use the left bar end without the mirror interfering? Maybe what I'm wanting to do isn't possible

I'm not sure what is meant by "with bar end", but I have a set of Ergon GP1 grips on my Specialized bike, and you can leave off the plug and use an internal mounted mirror. I have a Mirrycle internal mount on the left side of mine, and it's great.

These are the Ergon grips with the built on vertical bar ends https://www.ergon-bike.com/us/en/product/gc3. I really, really want something I can switch my hands to besides just the bars. I found a thread on MTBR that look sliek it's doable https://forums.mtbr.com/7896176-post2.html. I'm just trying to get clarification on how the mirror actually mounts with the GC3 grips. He's got a picture of it done and it looks great! I'm hoping he didn't do it with a legacy set of GC3s that may have been made differently. Crossing fingers...

Picking up an old thread with the same issue today. I did a search and didn't come up with a solution so did my own using a third eye mirror. This is for my wife bike and I have not tested it for adjustability, but I think I have a solution for that too.

1. Remove the Ergon GC3 from the Handlebar.
2. Remove the bar end extension from the grip
2. Disassemble the Third Eye mirror to the point where the screw is still in the base.
3. There is a hole in the middle of the bar end extension that is slightly smaller than the threads of the screw. It will thread itself in the hole.
4. install one of the rubber internal spacers on the thread protruding from inside the grip
5. Install the square nut and thread down to the rubber spacer/expander. Make sure there is enough compression so when you turn the screw the nut does not rotate.
6. Test that the bar end extension will mount on the handle bar and the internal rubber expander will insert as well. If it doesn't go in, you need to back the nut off a little.
7. Reassemble the grip and bar end extension.
8. Install the Ergon/mirror assembly onto the handlebar to full engagement so the bare end extension can clamp the bar. You can tell by looking at the bar through the slot where the clamp screw is.
9. Now you can tighten the mirror to what is needed and adjust for use. Don't worry about stripping the new threads in the hole. The combination of the rubber expander and the hole in the bar end extension should provide ample stability for the mirror.

I did this at night so don't have pics. Hopefully the text is enough to understand what to do.

I haven't done this with a mirror, but I use Ergon grips along with Cane Creek Bar Stablilizers. They make a really nice combination, though I did have to move brake levers and shifters inboard, and use a hacksaw to shorten the Ergons by about 1/4 or 3/8 inch. To add a mirror, I would need either a longer bar, or at least one with a longer straight section.

The simplist solution is to start with Ergon GP1 grips, add conventional bar ends, tape over them with bar tape, and mount a Mirrycle oriented DOWNWARDS and INWARDS instead of upwards and outwards Gives unobstructed use of the barend and clear view of the mirror without your arm blocking it.