Mirrors.
At 20-28 mph, shoulder checks cost more than they used to. A bar-end mirror is cheap and keeps your eyes forward.
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MirrycleTop pick
MTB Bar End Mirror
The long-standing default: glass optics, solid pivot, fits most flat bars.
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Hafny
HD Bar End Mirror
Stainless-lens bar-end mirror with a cleaner look; popular on commuters and e-scooters with bar ends.
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