noun
gymnastics wheel; German wheel; gym wheel
A large wheel apparatus used in gymnastics, also known as a Rhönrad. The term is a direct loan from German.
from German Rhönrad
ルーンラートの演技はとてもダイナミックだ。
Performances on the gymnastics wheel are very dynamic.
彼女はルーンラートで新しい技を練習している。
She is practicing a new skill on the German wheel.