Rear Derailleur Hanger Replacement Single Lead M12x1 For F Si Synapse Topstone Slate 2018 Gen Carbon And Alloy Bikes K33049 Substitutes KP419 Keeps Shifting Smooth And Precise Ready To Roll

Single-piece Rear Derailleur Hanger M12x1 for 2018 Synapse
✔️ Single lead M12x1 derailleur hanger for 2018 Synapse, 1 piece

This rear derailleur hanger replacement is built for 2018-generation Synapse Carbon, F-Si, Topstone Alloy, and Slate bikes. It’s designed to restore derailleur alignment and maintain precise shifting after impacts or wear.

✅ Single lead version with M12x1 threads for 2018 Synapse, F-Si, Topstone, Slate
✅ Substitute part is K33040 Hangar; updated KP419 version
✅ Original Cannondale hanger for 2018 generation bikes; color black
✅ 1 piece replacement; ready to install and ride

💡 What is a derailleur hanger used for?

A handy, general explanation for this bike part: it protects the derailleur and frame and helps keep shifting smooth.

- Keeps derailleur alignment after impacts and protects the frame
- Helps maintain precise shifting across gear ranges
- Fits common M12x1 thread standards for 2018-gen bikes
- Acts as a sacrificial part to protect drivetrain