Cut a large mango into chunks, and add them to a small saucepan. Add the juice of 1 lemon and 1 lime. Add in 1/2 cup of sugar, and warm the mixture over a low heat until the sugar has dissolved.
Transfer the mix to a blender and puree until super smooth. Transfer the puree to the refrigerator for about 30 minutes, just to remove any heat.
Fill a highball glass with 3 ounces of the mango puree and 1 ounce reposado tequila, stir. Add in some ice and top off with club soda. Garnish with a lime wheel.