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Rear Derailleur 11-Speeds Microshift M665M

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  • Rear Derailleur 11-Speeds Microshift M665M
Colour: PURPLE
Not available

Store Availability

11-speed mountain bikes and hybrid bikes with a single chainring.



Compatible with Microshift and Shimano 11-speed shifters


Repair your bike and give it a new lease of life!


Technical specifications

Shimano / Microshift compatible

Maximum teeth: 46 teeth

Minimum teeth: 11 teeth

Total capacity: 41

jockey wheel: 11 teeth


The small button on the derailleur is a cage lockout (like on the Shimano Shadow+).

This helps:

_ better chain retention, vital to prevent derailling with single chainset (with a front derailleur no longer mounted to retain bike chain).

_ quieter downhill performance on uneven terrain .

This lockout is deactivated for smoother gear shifting when riding on even terrain or making it easier to dismount the wheel.

Assembly tips

When replacing your derailleur, check the condition of the cables, and if frayed or oxidised it is, we recommended you replace them.

Check the derailleur hanger is properly aligned to perform adjustments. Replace it or true it if necessary.

Maintenance tips:

Clean your derailleur with slightly warm soapy water.

Do not use grease remover products that damage plastics.

Need any help?

The technicians at your Decathlon store are at your service to help you replace your bike parts. Feel free to ask them for help!



Main part: 30.0% Polyamide, 70.0% Aluminium

Tips for storage and maintenance

Storage tips

Store the derailleur in a dry and temperate place, keeping it away from corrosive products and sea air.

Restrictions on use

Get compatibility and assembly checked by a technician



2 Years