The Shimano 105 RD5700 Tension Guide Pulley Set is replacement part for Shimano 105 rear derailleurs They are constructed from durable composite material with sealed cartridge bearings making the pully set quiet smooth and durable It is suitable for RD5701 RD5700A RD4601 RD4600 LX RDT670A LX RDT670 RDF800

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