SRAM Frame Sleeve The B-Bolt If you're replacing worn-out or missing parts, then you'll want to make sure you get the right parts to get the job done. The SRAM Frame Sleeve is a B-Bolt that works with all SRAM XXSL, XX, X0, and GX T-Type rear derailleurs. It comes with two B-bolts. Features Rear derailleur frame sleeve B-Bolt in a quantity of 2Designed to work with all SRAM XXSL, XX, X0, and GX T-Type rear derailleurs Manufacturer's part number: 11. 7518. 104. 022 | Sram | Frame Sleeve B-Bolt T-Type Qty2