Race Face Direct Mount Oval chain rings help you to use your power well over the entire crank turn. Oval chain rings offer improved traction compared to conventional chainrings, especially in high force and low cadence situations. Race Face relies on 10% ovality and 112.5° shift to the crank arm, which are achieved thanks to the markings, no matter how the chain ring is aligned. The shape of the chain ring with alternating wide and narrow teeth helps to keep the chain from jumping and is also compatible with many chain guides. The chain ring is available in four different sizes and gives you an advantage to the toughest part of the round. Manufacturers description: material: 7075 aluminium optimised tread profile with variable tooth width keeps the chain from jumping. Super Boost compatible 10, 11 and 12-way compatible. Compatible with Race Face cranks for the RCA system. Weight: approx. 72 g (32 teeth). Use: XC/Trail/AM/Enduro. Note: the image is an example, the number of teeth varies depending on selection. Material: