Radler beer is a popular beverage originating from Germany, made by combining beer and lemonade. The term "Radler" means "cyclist" in German, and the drink is believed to have been created to quench the thirst of cyclists during a bike ride. The original Radler was made by mixing two parts beer (usually a lager or another type of lighter beer) with one part lemonade or a lemon-lime soda. However, curious brewers eventually began experimenting with other juices and sodas, and today, there are variations with different fruit flavors like grapefruit, orange, or even raspberry.

Radler and shandy are two similar beer-based drinks that are often used interchangeably. The main difference between them is that shandy is most often mixed with lemonade or even lemon-lime soda, while a Radler can be mixed with any form of fruit juice, including grapefruit, for example.

Radler beer is a refreshing summer drink that is low in alcohol and perfect for hot summer days. It is easy to make at home, and the base beer matters. Traditionally, it is made with light lager or pilsener.