The Absolute Black E13 Oval Dm Chain Ring replaces the existing chainring and spider on E.Thirteen TRS Cranks.   Absolute Black E13 Oval Dm Chain Ring Features Oval Rings help the rider spin smoother and generate more power Narrow-wide tooth profile keeps the chain snug, allowing you to leave the chain guide behind Works with 1x9/10/11/12sp or singlespeed setups, chainline 49mm Designed in UK, manufactured in Poland CNC machined 7075 Txxx Aluminum 58g (30t) Ring Type: single (anti chain drop) Armx BCD: TRS Quick Connect Teeth: 32t Color: Black