In small saucepan, heat 2 cups water to a boil over high heat. Place tea bags and sugar in heatproof pitcher; add boiling water and steep 5 minutes. Remove and discard tea bags. Add 1 cup ice, grapefruit juice and lime juice; refrigerate 1 hour or until chilled. Makes about 4 cups.
Spread salt on plate. Run 1 lime wheel around rims of 4 (12-ounce) highball glasses to dampen; dip rims of glasses into salt to coat and add ice.
Pour tea mixture into prepared glasses; top with club soda and garnish with remaining lime wheels.