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Shimano Ultegra FC-R8100 12-speed internal road bike chainring

(13 reviews)

34 and 36 teeth

I choose my options

Speed compatibility

Toothing

Tray

Tray position

Ref : 1871221
€11.87
Price : €19.99
In stock

Based on 13 reviews

Show reviews
Plateau vélo route Shimano interne Ultegra 12v R8100

Shimano Ultegra FC-R8100 12-speed internal road bike chainring

More details In stock

Shimano Ultegra FC-R8100 12-speed internal road bike chainring

€11.87
Plateau vélo route Shimano interne Ultegra 12v R8100
Our opinion

Adapt your gear ratio throughout the season or according to your training region.

Sylvain C.

Mechanical expert



The Shimano FC-R8100 chainring is exclusively compatible with the Ultegra 12-speed crankset of the same brand.

Available in only two versions with 34 or 36 teeth, Shimano has developed its cranksets while maintaining the logic of chainring pairs. For example, the 34-tooth chainring is only compatible with the large 50-tooth chainring and not the 52-tooth chainring. The same applies to the 36-tooth chainring, which must be paired with the 52-tooth chainring.

Shimano 12-speed cranksets are compatible with 11-speed drivetrains.

Technical specifications

- Drivetrain: Shimano 12-speed - Position: internal - Compatibility: Ultegra FC-R8100 - Mounting torque: 50x34, 52x36


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Reviews subject to control

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10/10


Based on 13 reviews

  • Image utilisateur Christian P.
    Published Jun 26, 2026 at 07:31 pm (Order date: Jun 15, 2026)
    5

    Great. (Translated review)

  • Image utilisateur ALAIN L.
    Published Apr 30, 2026 at 08:02 pm (Order date: Apr 19, 2026)
    5

    Very good (Translated review)

  • Image utilisateur Vito M.
    Published Apr 06, 2026 at 08:16 pm (Order date: Mar 24, 2026)
    5

    Delivered very quickly (Translated review)

  • Image utilisateur Martial b.
    Published Mar 21, 2026 at 07:33 pm (Order date: Mar 10, 2026)
    5

    Very good (Translated review)

  • Image utilisateur Jessy G.
    Published Nov 17, 2025 at 03:16 pm (Order date: Nov 01, 2025)
    5

    As per my expectations (Translated review)

  • Image utilisateur Marc J.
    Published Apr 07, 2025 at 06:34 pm
    5

    36 is small, why 52-36 and not 52-38? The 38 is much harder to find and at a higher price. Too bad... (Translated review)

  • Image utilisateur Fabien P.
    Published Apr 02, 2025 at 04:26 pm
    5

    Nothing to report, product conforms and fast and careful delivery. (Translated review)

  • Image utilisateur Richard T.
    Published Mar 29, 2025 at 09:51 am
    5

    The quality of the original (Translated review)

  • Image utilisateur BERNARD B.
    Published Oct 04, 2024 at 11:25 am
    5

    Thank you for your very accurate advice, the chainrings are compatible with my Ultegra crankset. Best regards (Translated review)

  • Image utilisateur Thomas F.
    Published Mar 13, 2024 at 08:30 am
    5

    Fast delivery (Translated review)




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