If your derailleur pulleys are clapped out, it's not a bad idea to change them - they do get exposed to a ton of wear. New ones improve shifting, reduce noise and improve chain life.
These pulleys are made from lightweight, durable materials and feature precision bearings for a buttery-smooth operation.
Don't let your rear derailleur hold you back from crushing the trails. Upgrade to Garbaruk Rear Derailleur Pulleys and feel the difference! Your bike will thank you, and you'll be the talk of the town (or the trails). Who knows, you might even be able to convince your friends that you've got superhero powers because of your lightning-fast shifting.