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Rotor bolt kit and covers for Shimano Ultegra Di2 R8100 crankset
Voir les avis clients(2 reviews)
For Ultegra Di2 R8100 crankset
Notre avis
Integrate your Rotor chainrings perfectly with your Shimano Ultegra Di2 12-speed crankset.
Julien C.
20 years' experience in the world of cycling
The covers fit perfectly over the Shimano R8100 crankset star on your Rotor chainrings and allow you to mount standard chainrings or Rotor chainrings. The covers also feature a threaded hole (chimney) into which the retaining screw for the two chainrings is screwed (screws supplied).
You can change your gear ratios or fit Rotor chainrings (oval or round) while maintaining the aesthetics of the crankset. Using this kit also preserves high-quality indexing.
You can change your gear ratios or fit Rotor chainrings (oval or round) while maintaining the aesthetics of the crankset. Using this kit also preserves high-quality indexing.
Technical specifications
- 4 threaded covers
- 4 screws
- Compatible only with Shimano R8100 4-arm Di2 crankset
- Allows mounting of Rotor-compatible chainrings (oval or round)
- Brand: Rotor
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We value your opinion
Our customers, our best ambassadors
-
Romain D. 
Published Feb 20, 2026 at 02:37 pm (Order date: Feb 08, 2026)Matches the description (Translated review)
- Alexandre L.
Published Jul 19, 2025 at 10:47 pmExactly the right kit to mount Ultegra 8100 crankarms on Q Rings Rotor compatible with Shimano. (Translated review)
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