One of a kind special oval shape that helps you climb easier and faster Allows use of an oval small ring with a round large ring, or 2 oval rings Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction Superb quality with great 6 point shifting design Reduces stress on knees and helps to maintain your legs fresher for longer Provides excellent weight to strength ratio 130mm 5-bolt 53T 7075AL Black 1/9/10/11/12sp Standard