Create a tar archive split into blocks of a maximum size

Let's say you have a lot of data and instead of a big tar file you want smaller ones.
Let's say that you want 200MB files. Very simple, just type

tar cvzf - dir/ | split --bytes=200MB - sda1.backup.tar.gz

NOTE that to untar you have to cat the files before:

cat sda1.backup.tar.gz.* | tar xzvf 

Credits to Jordanm for post