Machined aluminum shell threads together for precise bearing alignment and frame fit, reducing bottom bracket creaking and premature bearing wear.

• Replaceable Enduro bearings
• Made in the USA
• ZERØ Ceramic sealed bearings
• Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity
• Silicone VV-type 2-lip non-contact labyrinth seals for excellent bearing protection with minimum friction
• Long-lasting Rheolube synthetic grease helps prevent contamination

BB30 to Shimano Thread-Together Bottom Bracket with ZERO Ceramic Hybrid Bearings, Black 

• Spindle Interface Type: Shimano Hollowtech II , FSA MegaExo , FSA MegaExo Light , RaceFace EXI
• Bottom Bracket Shell I.D.: 42
• BB Shell Width (mm): 68 mm , 73 mm
• Defined Color: Black
• BB/Frame Interface: BB30
• Weight: 127 g