Garbaruk Rear Derailleur Cage - Cage Plate - Shimano GRX Di2 11-Speed - Black YGroup_7033472778285 Pros: Fits a majority of

Pros: Fits a majority of internal nipple sizes

This is what you need

HEAD - Presta / Schrader / Dunlop with integrated dust cap

Axle standard rear: 12x148mm

Garbaruk Rear Derailleur Cage - Cage Plate - Shimano GRX Di2 11-Speed - Black YGroup_7033472778285 Pros: Fits a majority ofIncrease the capacity of your SRAM or Shimano 11 speed derailleur up to 50T with these precision machined derailleur cages from Garbaruk. This derailleur mod will position your jockey wheels in the optimum position to provide maximum chain wrap in the smaller cogs, whilst also ensuring sufficient clearance to ensure smooth shifting to and from the largest cogs. Recommended Installation Options: SRAM derailleur: (10 46 and 10 48T cassette) Garbaruk RD