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Shimano Ultegra RD-R8050-GS Di2 Rear Derailleur - 11-Speed, Medium Cage, Black : Sports & Outdoors - Amazon.com
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SHIMANO SAINT M820 10v Groupset with Shifter Rear Derailleur Cassette Sprocket Bottom Bracket Crankset Chains Brake 10-speed
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Shimano Dura Ace 7970 Di2 10 Speed Electronic Front Derailleur (Braze) RRP £390 4524667278610 | eBay
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