Medium Cage Rear Derailleur

Medium Cage Rear Derailleur

Ultegra RD-6870-GS

The Shimano RD-6870-GS is the medium cage rear derailleur for the 6870 series.

It supports a max front difference of 16T, a low sprocket minimum of 28T and a low sprocket maximum of 32T. The top sprocket maximum is 12T and the minimum is 11T. It has a total capacity of 37T and weighs only 11g more than the short cage derailleur - 268g.

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