- Machined 7075 aluminum chainrings built to be lighter and more durable than most options on the market and engineered for excellent chain retention and smooth power transfer - 1.5mm Inboard offset is used for 52mm chainline - 1.5mm Outboard offset is used for 55mm chainline (used on new generation Shimano full wireless and current generation SRAM transmission) - SRAM tooth profile is compatible with SRAM Eagle/T-TYPE chains and all 9,10, and 11spd chains - Shimano HG+ tooth profile is compatible with 12spd Shimano HG+ chains and 12spd KMC chains