Restore Crisp and Reliable Shifting The rear derailleur is the hardest-working component on your e-bike. If your gears are skipping, shifting feels clunky, or your original derailleur took a hit on a rugged trail, this Official Burchda Replacement Derailleur will restore your drivetrain to factory-fresh, buttery-smooth performance. Key Performance Features: E-Bike Rated Durability: Engineered with high-strength components to withstand the high torque and heavy loads generated by powerful electric hub motors. Precision Gear Changes: Features optimized spring tension for fast, accurate upshifts and downshifts. Direct Bolt-On Installation: 100% genuine factory part. It mounts directly to your existing derailleur hanger for a straightforward replacement. 🛑 CRITICAL FITMENT GUIDE: SELECT YOUR SPEED Because different Burchda e-bike models (and different manufacturing batches of the same model) utilize varying drivetrain systems, these derailleurs are NOT universally interchangeable. You MUST manually verify your bike's speed before adding this item to your cart. Using a 7-speed derailleur on an 8-speed bike will result in severe chain skipping and damage. How to Choose the Right Option: Walk over to your e-bike's rear wheel. Count the total number of metal cogs (sprockets) on your rear cassette/freewheel. Match that number to our options: Counted 6 cogs? Select the 6-Speed option. Counted 7 cogs? Select the 7-Speed option. Counted 8 cogs? Select the 8-Speed option. (Pro Tip: For the best shifting performance, we highly recommend inspecting your shift cable and derailleur hanger for any bends or damage when installing your new rear derailleur.)