BOTTOM BRACKET SPACER - Aluminum spacers for ISO/English or BSA threaded bottom brackets. Spacers fit between bottom bracket cup and frame. Great for fine tuning bottom bracket shells or improving chain-line. - Outer Diameter: 1.610" - Inner Diameter: 1.380" - Available in 0.7, 1.8 and 2.5 mm thickness - Machined aluminum - Anodized Black - Sold by unit