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Shimano GRX-820 2x12s rear derailleur
Total capacity 42t black
Order number: 1111274 Manufacturer item no.: IRDRX820
Shimano GRX-822 1x12s rear derailleur short
Total capacity 35t black
Order number: 1111275 Manufacturer item no.: IRDRX822GS
Shimano GRX-822 1x12s rear derailleur long
Total capacity 41t black
Order number: 1111276 Manufacturer item no.: IRDRX822SGS
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