Which is the Lord of the Rings: standard round, or oval?

With all due apologies to J.R.R. Tolkien, this product is one to consider for improving your pedal stroke. An oval ring looks weird to me, but it helps you to attain smoother pedaling. It may also help with rear-wheel traction. Look here for some MTB opinions. I also like this tour; and think it\’s especially interesting the way they minimize waste.

Available in sizes from 32-36 teeth.