Sram X4 Derailleur bearing upgrade caps

thingiverse

The original SRAM X4 derailleur gear comes with no bearings at all. Instead, its two caps serve as makeshift bearings, making contact between two plastic parts that inevitably generates a lot of friction. This friction culminates in noise, eventually becoming unbearable. To upgrade this setup, you'll need to replace these parts with identical ones that allow for the installation of a 606 type bearing between the cap and gear. It's advisable to opt for double-sealed bearings, such as the 606ZZ model found in most catalogs, to experience significantly smoother performance.