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Shimano Ultegra 5800 6800 R8000 RD R8000 road bike bicycle 11speed Rear Derailleur SS/GS Short Cage/Medium Cage|shimano ultegra|rear derailleurultegra shimano - AliExpress
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How to convert short cage rear derailleur to medium cage (Shimano Ultegra 6770 with 6800 cage) - YouTube
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