Di2 cable gusset Shimano Y3GK89000

The Shimano Y3GK89000 bellows is an essential original part to ensure the durability and reliability of your Di2 electronic drivetrain. Designed to protect the electrical cable connection at the rear derailleur, this small component plays a key role in keeping out moisture, dust and dirt.

Made from flexible, hard-wearing rubber, it ensures an optimum seal around the EW-SD300 cable, preventing any infiltration that could affect the performance of the electronic system. Discreet but essential, it helps to keep your Shimano unit running smoothly and accurately, even in difficult conditions.

Compatible with several Shimano Di2 12-speed groupsets (including Dura-Ace, Ultegra, 105 and certain MTB/GRX models), this bellows is ideal as a replacement for a worn or lost part when servicing your bike.

Key features:

• Original part Shimano (reference Y3GK89000)
• Effective protection against water, dust and dirt
• Di2 EW-SD300 compatible (12 speeds)
• Quick and easy to fit
• Essential for preserving electronic connections

FAQ - Bellows Shimano Y3GK89000

What is the purpose of the Shimano bellows?
It protects the Di2 electric cable connection at the derailleur from water, dust and dirt.

Is it an important part?
Yes, even if it's discreet, it's essential to guarantee the longevity and reliability of the electronic system.

What groupsets is it compatible with?
It's compatible with many Shimano Di2 12-speed groupsets: Dura-Ace R9250, Ultegra R8150, 105 R7150, GRX and certain MTB models.

Is it difficult to install?
No, it is very easy to fit around the cable at the derailleur.

Can you ride without it?
Yes, but we strongly advise against it: without protection, the connector is exposed to the elements.