Goes between the BB shell and the outboard cup body.

Use with any brand of MOUNTAIN outboard bottom bracket cups.* Used for proper cup spacing and chainline adjustment.

*Follow manufacturer's instructions. Shimano/Enduro/Race Face may require up to three spacers. GXP bottom brackets use a maximum of 2 spacers. All RWC and Enduro bottom brackets ship with spacers included. MATERIAL: ANODIZED 6061 ALUMINUM