SRAM XX1 Eagle Type 3 12 Speed Rear Derailleur - Lunar Grey - 12 Speed YGroup_7033437061165 Cons: A little bulky

Cons: A little bulky

Reduce caliper fluid temperature with the SRAM Heat Shield technology

Please note: Depending on your frame and wheels

Capacity: 320L

5mm width to prevent wear to your freehub body

SRAM XX1 Eagle Type 3 12 Speed Rear Derailleur - Lunar Grey - 12 Speed YGroup_7033437061165 Cons: A little bulkyThe top of the line XX1 Eagle derailleur is the next evolution of SRAM's brilliant X HORIZON derailleur range. The cage on the latest models (Lunar Grey) has been tweaked slightly to increase the range to work with 10 52t cassettes. The XX1 Eagle features a couple of upgrades over its little brother the X01 Eagle. The Carbon Fibre outer cage is the most noticeable change, while there are also upgraded stainless steel pulley bearings hiding in there