Upgrade your drivetrain with EJ's derailleur jockey wheels, precision-engineered specifically for Shimano 12-speed 13T/13T systems. These jockey wheels deliver crisp shifting, durability, and smooth performance in the harshest riding conditions.
🔧 Key Features
CNC Machined from high-strength Aluminium Alloy
Designed specifically for Shimano 12-speed 13T / 13T setups
Precision tooth profile keeps the chain securely in place for accurate, crisp shifting
Ceramic sealed bearings for ultra-smooth running and reduced drag
Double seal for added protection against dirt, water, and debris
⚠️ Note: Stainless steel bearings are not used, as they are softer than bearing steel and wear out faster under load. Visible rust indicates contamination—any bearing will fail regardless of material.
