What light is that? You like?
I'd suggest investing in full wrap fenders, they are great! I have a pair on my cx bike and they barely rattle on the bumpiest gravel roads and singletrack. You can also cover the fenders in reflective tape which adds some confidence.
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light and motion seca 400 waaaayyyy too much money but its frkin sweet.
I was going to go with the full wrap fenders but dont really like the look of them.