SRAM PC-XX1 Eagle Hollow Pin 12 Speed Chain - Black - 12 Speed PLP|Model Year BBS4416: 16 notch BB socket

BBS4416: 16 notch BB socket for 44mm diameter notch pattern

more durable Spike rim using Dynamal magnesium-silicon enriched aluminium with sleeved joint

Ease of use (caps literally fall off)

SD-2 Shop Screwdriver: #2 Phillips

SRAM PC-XX1 Eagle Hollow Pin 12 Speed Chain - Black - 12 Speed PLP|Model Year BBS4416: 16 notch BB socketThe engineers at SRAM have put a huge amount of fanatical detail into every aspect of the XX1 Eagle chain to make to provide you with the ultimate combination of consistent performance, uncompromising strength, ultra light weight, and silky smooth, whisper quiet operation. These chains don't just look super fancy but they are loaded with features that make them the quietest, strongest, and most wear resistant chain you're likely to find anywhere.