Wolf Tooth Components Drop-Stop Elliptical Chainring 30T for SRAM GXP Direct MntDesigned 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. 6mm offset designed for use with cyclocross and road cranksets (47mm chainline) or GXP and long spindle BB30 cranksets (49mm chainline) Elliptical rings provide smoother, more