SRAM RED XPLR X-Sync Thread Mount Chainring - 12/13 Speed Tool Kits Includes both the upper guide

Includes both the upper guide pulley and lower tension pulley

and this pump delivers an accurate

Engineered to aerospace standards

The Park Tool BCB-4

Mounts to a square taper JIS bottom bracket -- sold separately

SRAM RED XPLR X-Sync Thread Mount Chainring - 12/13 Speed Tool Kits Includes both the upper guideWhat is the SRAM RED XPLR X Sync Thread Mount Chainring? The SRAM RED XPLR X Sync Thread Mount Chainring is a direct mount replacement chainring for RED XPLR E1 cranksets. It uses a Thread Mount interface that threads directly onto the crankset spider for a clean, secure connection. X Sync narrow wide tooth profile provides excellent chain retention without a chain guide, using alternating tooth widths that engage the inner and outer chain links