This is just for the "small" inner chain ring.

You have been seeing these ring plague the Pro Tour peloton over the last couple years and now they are available to the public!!

The OSYMETRIC ring is not an oval nor an ellipse – it is a twin cam shaped to win. This patented design reduces the gear and the effort needed to get through what is commonly called the “dead spot” in everyones pedal stroke. Then it increases the usable gear during the power portion of the pedal stroke between the 1 and 5 o’clock positions of the crank so your body can take full advantage of its natural strength. This powerful tool can reduce lactic acid by 10% and increases power by 10% for anyone that uses them.

Sizes	Shimano/SRAM 130 BCD	Campagnolo 135 BCD	Compact 110 BCD
38t	NO	NO	YES
42t	YES	NO	NO
44t	YES	YES	NO