Here is the thread you referenced: https://electricbikereview.com/forums/threads/ebike-mirror-recommendation.30921/#post-233942Careful. I expressed my opinion that the Mirrcycle is inadequate for speed pedelec use and I was roundly chastised by forum members. But in spite of the flaming, I haven't changed my opinion. This picture, where I overlayed a cutout of the Mirrcycle on my Ergotech says it all (imo). When I go through the winding roads of an urban park in my area, the Mirrcycle sometimes cannot see the cars coming around curves behind me although it is positioned perfectly for riding on a straightaway. I find myself having to fiddle with the Mirrcycles a lot. This Ergotec (on my Haibike) gives me a wider view without being a gigantic mirror. My B&Ms on my faster bikes I also think are just more adequate for a speed pedelec. I have Mirrcycles on my Terns where I value more the compact size and travel at lower speeds.
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I just read thru the whole thing and didn't find any 'chastising' or 'flaming'.
It would seem you thought other choices or preference was some kind of slight on you - it's just not.
You expressed difficulties that no one else had - it's okay to disagree. Personal experiences and opinions are why we're all here.