CRG Hindsight Mirrors - $69.95 or $85.95 each
Above - The CRG Hindsight LS FOlding Mirror. The 3" mirror is on a ball for adjustment and a pivot to rotate the mirror out of the way for parking. The non-folding mirror will save you $16, but doesn't have the folding pivot.
A $20 adapter can be used to attach the Hindsight mirror to the end of the bar. This is necessary if there isn't enough room on the outside of the grip to clamp the mirror. The adapter fits bars with IDs from 12mm (.475") to 19mm (.750").
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CRG Hindsight Mirrors - $69.95 or $85.95 each
Hindsight mirrors have set the standard for bar end mirrors. There are no imitators for this product because it is the best mirror setup. I sell both the adjustable pivoting variant, and the non-folding variant. The folding variant is nice to have when parking in tight spaces.