SRAM XX SL Eagle 1987 Silver Edition T-Type Thread Mount Chainring - 32t 12-Speed Thread Mount For XX SL PM Spider 3mm Offset Aluminum**DOES NOT INCLUDE MANUFACTURER PACKAGING**SRAM XX SL Eagle T Type Thread Mount Chainring 32t 12 Speed Thread Mount (For XX SL PM Spider) 3mm Offset Aluminum Black Silver. Designed for use with SRAMs XX SL Eagle power meter these Thread Mount replacement rings are purpose made for use with the XX SL proprietary spider design. This chainring mount system allows reduced weight without compromising reliability. Proprietary Thread Mount design