The new Shimano 105 R7000 Rear Derailleur has been designed to offer exceptional performance on both road and gravel routes. Direct Mount CompatibleShadow Road TechnologyStable Shifting PerformanceWide Gear Range CompatibleWeight: 225gUsing Shimano's Shadow technology, the derailleur maintains chain tension over challenging terrain and offers a silent ride, perfect for the demands of gravel riding and cyclocross racing. The R7000 rear derailleur has two options depending on what size cassette you run. The SS variant is compatible with 25T to 30T cassettes and the GS variant is compatible with a wide gear range, allowing 11-34T cassettes to be run.