counter for wheels and flowers
「輪」 has another reading with different meanings.
ring; circle; loop
彼女は指に美しい輪をはめていました。
She was wearing a beautiful ring on her finger.
子供たちが輪になって踊りを楽しんでいた。
Children were enjoying dancing in a circle.
オリンピックの五輪のマークは有名です。
The five rings symbol of the Olympics is famous.