Whisk ¼ cup vinegar, 2 tablespoons cilantro, 1 tablespoon oil, ¼ teaspoon salt, ⅛ teaspoon chipotle powder and ⅛ teaspoon pepper together in a large bowl.
Stir in sliced cucumber, matchstick carrots and sliced red onion.
Toss to coat.
Cover and refrigerate for at least 2 hours (and up to 4 hours) before serving.
