Wolf Tooth 120 BCD Chainring - 38t 120 BCD 4-Bolt Drop-Stop Black. Designed as a direct replacement for cranks or 4-bolt spider utilizing a 120 BCD. These rings will allow you to convert your 120 BCD crankset like the SRAM XX and others to a 1x application. They feature Wolf Tooth's proprietary mud clearing Drop-Stop tooth profile design.

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

Drop-Stop chainrings are designed for use with 1x9 1x10 1x11 and 1x12 drivetrains

Compatible with all 10- 11- and 12-speed chains with the exception of Shimano 12-speed chains

Shimano 12-speed chains require the use of Wolf Tooth's Shimano 12-speed specific chainrings

If using a 9-speed drivetrain use a 10-speed chain which will provide a tighter fit for better chain retention

This chainring is threaded and requires the stock chainring bolts that came with the crank (not compatible with 6mm/10mm chainring bolts)

Made from 7075-T6 aluminum for long life