Pour about 1 teaspoon of kosher salt on a small plate. Moisten rim of glass by rubbing with a lime wedge. Dip rim of glass into salt to coat evenly.
Pour simple syrup, lime juice, lemon juice, and orange juice in a cocktail shaker filled about half full with ice.
Cover and shake vigorously for about 15 seconds.
Pour into rimmed glass. Garnish with lime wheel or wedge.
Notes
Nutrition info does not include salt for rimming glass.
To make by the pitcher, multiply the liquid ingredients by the number of servings desired. Pour into a pitcher and stir to combine. Pour into salt-rimmed glasses filled with ice.