Avian BB86 Bottom Bracket Type:Standard White area is big enough

White area is big enough to accommodate 3in tall numbers to be in compliance with the USABMX rule

Ensures smooth gear shifts

Built for durability

24mm Hollow Chromoly Spindle

Avian BB86 Bottom Bracket Type:Standard White area is big enoughMany of the top frames on the market utilize a press fit BB86 bottom bracket shell. We offer three versions, a sealed and a ceramic bearing option with composite cups, as well as a sealed version with alloy cups. SPEC Composite Cups 2. 65oz Alloy Cups 3. 15oz Compatible with 24mm spindles Inner plastic o rings and dust shields 41mm press fit cup for 86. 5mm shells Compatible on high end frames by manufactures such as Speedco, Haro, Redline, & Chase