The Race Face Era Cinch Direct Mount Chainring is built to last and features stainless steel teeth, a carbon fiber spider, and an aluminum CINCH interface for premium performance and durability. This chainring is offered in a 10-12-speed Narrow-Wide style or a Shimano HG 12-speed configuration. Weighing at only 83 grams, the Era Cinch Direct Mount Chainring is one of our top choices for a 12-speed mountain bike chainring.