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Title: Positively the BEST bike mirror
Review: I've tried at least a half dozen different mirrors for my bicycle, and they all were failures. THIS mirror is a very high quality item that WORKS! Don't let the word 'convex' scare you; it's a very slight convexity that doesn't make everything disappear after 20 feet. You can precisely tweak the adjustment 'tension' to your liking, and it will not shift or shake. Highly recommend.
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