Shimano Ultegra 6870 GS Di2 11 Speed Electronic Rim Brake Groupset

What’s included: Shifters (ST-6870), front derailleur (FD-6870), rear derailleur (RD-6870-GS), battery (SM-BTR1), junction box A, junction box B, Di2 wires. Brake type: Rim brake. Rear derailleur: Long cage: (GS).

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