Tech 3 V4 Tech Specs:

PRO 20 backpack and protects your lower back from injuries

Simply put

Once the allen key bolted is fully tightened the clamp has enough tolerance to allow the spacer to turn inside the clamp

Wolf Tooth B-RAD Double Barrel Bottle Cage Adaptor PDP|Colour Tech 3 V4 Tech Specs:B RAD (Be Rad), Bottle Relocation and Accessory Device, is an innovative and extremely flexible system for organising on bike bottle and accessory storage using bottle cage mounts. The system requires the use of the B Rad mounting bases, available separately. This product page is for the side by side bottle mount. Included are two Double Bottle adapter mounts and associated hardware. Compatibility: REQUIRES the use of a B RAD base and usually the B