Adding Kogel's titanium derailleur pulley bolts for Sram T-type derailleurs is a great way to secure the pulleys to your cage. Plus, our anodized color options give you more ways to make your bike uniquely yours. About Our Derailleur Cage Bolts Our titanium derailleur pulley bolts will fit any stock Sram Transmission rear derailleur cage, including XX SL, XX, X0, and GX versions . This set replaces the bolts that hold the upper and lower pulley. We could talk about weight savings, but let's face it: these just look really cool when you park your bike at the coffee shop. Technical Details: Description: High Quality & Lightweight Anodized Titanium Hex Bolts Application: Fits stock Sram Transmission rear-derailleur cages Fastener Type: 3mm Allen Head Material: Ti-3AI-2V Titanium Weight: 2.0g/ set Quantity: 2 bolts per package (outfit a single derailleur cage) Continue the quest for Guaranteed Performance and make your bike the ultimate expression of YOU.