Shimano XTR M960 Bottom Bracket Cup - Left OnlyShimano XTR M960 Bottom Bracket Cup Left Only Left replacement cup for M960 bottom brackets.

the MB-1 is available only in World Famous Park Tool Blue

They feature extra tall teeth for reliable chain retention when using chain tensioners and are machined from 416 Stainless steel billet with heat treating and electropolishing post processing for durability and corrosion resistance

DURABLE STAINLESS STEEL CONSTRUCTION: Ensures longevity and reliability on the trail or in the shop

Powered by Di2 shifting system battery

Prevents dirt adhesion

5mm thicker washer Hadley makes

Minimum weight 22 grams

Its extremely durable construction protects the longevity of the chain while also allowing for excellent torque

Quickly accessible

Low Steady

5mm 40T 1X W/O BB

Diameter: choose