Eccentric BB for PF30 & 24mm (Shimano) Cranks - Black

EBB InstallationConvert your PF30 frame to a single-speed setup with our simple to use eccentric bottom bracket. Enduro Angular Contact sealed bearings. Double lip seals on all bearings with high fill rate top quality grease for maximum durability. Machined aluminum cups are superior in function and durability to plastic. Fully serviceable.

Precision Machined in the USA

Availability: In stock

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  • Bearings: Enduro Angular Contact
  • Color: Black
  • Bottom Bracket/Frame Interface: PF30, Specialized Carbon OSBB
  • Bottom Bracket Shell Width (mm): 68mm - 73mm
  • Bottom Bracket Shell I.D.: 46mm
  • Chain Adjustment: 12mm
  • Crank Spindle Type: Shimano Hollowtech II, FSA MegaExo, RaceFace EXI
  • Crank Spindle Diameter: 24mm
  • Weight: 182g
  • Packaged for retail display

Compatible with the following Bottom Bracket Standards:

  • PF30
  • Specialized Carbon OSBB (with additional 3.5mm BB cup spacers - PF3.5-SPC)

Compatible with the following cranksets:

  • Shimano HollowTech II
  • FSA MegaExo
  • Rotor 3D, Agilis
  • RaceFace EXI
  • RaceFace X-Type


  • Do not install bottom bracket with the two bolts positioned above the bearing. Some carbon frames do not have proper internal support for the bolts to properly tighten to spec. As a result, the cups will not stay tight in the frame, and at worst, your frame may crack.

Incorrect EBB Orientation Correct EBB Orientation

Download: PF30 EBB SHIMANO Installation / Warranty Download PDF File

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