Avid BB7 Pad Adjuster Knob Kit Adjusting Your Brakes If you have Avid BB7 mechanical disc brakes and you need new adjuster knobs on them, then you're in the right place. This kit comes with everything you need to replace the lost or worn-out adjuster knobs on your Avid BB7 mechanical disc brakes. Features Comes with a left and right side Manufacturer's part number 11. 5311. 619. 010 | Avid | Bb7 Pad Adjuster Knob Kit 08+