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.
It also features Shimano's Crash Protection Mode - this prevents shifting after a crash to make sure the rear derailleur is damaged any further. To restore shifting functionality have a look at our FAQ I had a small crash and my rear derailleur stopped working. What happened?
Details & specifications
| Shimano model code | RD-6870-GS |
| Shimano model name | Medium cage rear derailleur |
| Weight | 268 g |
| Series | 6870 |
| Downloads |
Di2 Rear derailleur manual Ultegra 6870 manual |
| View on | Amazon (new tab) | eBay (new tab) Chain Reaction Cycles (new tab) |
Shopping links
Are you looking to upgrade your bike using this component? We've added shoppings links to this component's Amazon and eBay pages. Click the images below to view the Amazon product page or eBay search results.
