These are the Ergon grips with the built on vertical bar ends http://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 http://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...