Detailed information about the Radler type of beer
The Radler drink was invented by a South-German pub owner named Franz Xaver Kugler in September 1922 when he was afraid of running out of beer.
13,000 cyclists being on some kind of trip were visiting his tavern and Kugler started to mix lemonade into the remaining beer and pretended he had created the drink just for the cyclists so that they could drive home safely without being drunk and falling off their bicycles.
Radler ("cyclist" in German) is usually a mix of 50% lager beer and 50% lemonade although the percentages might vary a little.
Nowadays, Radler is usually drank in the Southern part of Germany while in the North practically the same drink is called "Alster" or "Alsterwasser".
The only difference is that an Alster is usually a mix of pilsner beer and lemonade. Percentagewise it is the same as the Radler recipe.
Naturally, this type of drink only has an alcohol content of about 2.5%, so that it is often drank by women or people in general in the afternoon to avoid the sometimes annoying "afternoon buzz" especially in the summer.
Hangover risk: quite low