7075AL oval rings intended for use during training sessions where weight is not a factor 7075AL oval rings intended for use during training sessions where weight is not a factor Compatible with Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 & Pioneer, SRM and other power meters Same great quality as AB`s other rings with less machining and detail which passes the saving on to the end user Allows use of an oval small ring with a round large ring, or 2 oval rings Reduces stress on knees and helps to maintain your legs fresher for longer Available in 4 and 5 bolt 110mm applications