Wolf Tooth Elliptical Direct Mount Chainring - 40t SRAM Direct Mount Drop-Stop For SRAM 3-Bolt Cranksets 6mm Offset Black. Designed to fit SRAM cranksets with removable spiders. Its proprietary design has an ovality of 10% and a timing of 112 degrees after top dead center which provide the beneifits of an oval ring such as greater rear wheel traction without the traditional downsides of oval rings.

Elliptical rings provide smoother more efficient pedal rotation which means better traction

Features Wolf Tooth's Drop-Stop tooth design for maximum chain retention

Made from 7075 Aluminum for long life

Optimized for use with 10 11 and 12-speed chains but not compatible with 9-speed chains