BB30 Outboard ZERØ Ceramic BB for 24mm Cranks (Shimano) - Black

BB86/92 Installation

Our BB30 Outboard bottom bracket will give you all of the same benefits as our well-loved Outboard style BBs. The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenance. This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement.

Specifically designed for installing 24.00mm spindle diameter cranks (Shimano, Etc.) in BB30 (42mm ID BB shell) frames without the need for any adapters.

Note: FSA MegaExo spindles can be between 24.00mm and 24.07mm in diameter. If your FSA spindle is 24.07mm, this BB will not work! Please call us at 800-361-8422 or email us at info@wheelsmfg.com to purchase our FSA 24.07x37 ceramic hybrid bearings separately.

Precision Machined

  • Bearings: Enduro ZERØ Ceramic Bearings
  • Color: Black
  • Bottom Bracket/Frame Interface: BB30, Specialized Alloy OSBB
  • Bottom Bracket Shell Width (mm): 68mm - 73mm
  • Bottom Bracket Shell I.D.: 42mm
  • Over Bearing Width: 90.5mm in 68mm wide shell*
  • Crank Spindle Diameter: 24.00mm
  • Weight: 122g
  • Packaged for retail display

* Over Bearing Width Dimensions include supplied silicone dust shields.

Compatible with the following Bottom Bracket Standards (42mm BB shell inner diameter):

  • BB30
  • Specialized Alloy OSBB.

Compatible with 24.00mm spindle diameter cranksets.*

*Note: FSA MegaExo spindles can be between 24.00mm and 24.07mm in diameter. If your FSA spindle is 24.07mm, this BB will not work! Please call us at 800-361-8422 or email us at info@wheelsmfg.com to purchase our FSA 24.07x37 ceramic hybrid bearings separately.

Enduro ZERØ Ceramic Bearings

The ZERØ ceramic bearings have ceramic balls and steel races.  The balls are Grade 3, Silicon Nitride (Si3n4).  These are the roundest balls you can buy without a military license.  The races are treated with a black oxide coating, which helps prevent rusting in the bearing. The races are then reground to a mirror finish after this treatment. Finally, they are cryogenically treated for strength before assembly. We also use Silicone VV seals, which is the lightest drag seal available on the market.

Si3N4 balls with 52100 High carbon Chromium Alloy Races with Cryogenic Treatment:
 Cryogenic treatment takes the races down to minus three hundred degree Fahrenheit to normalize the crystalline structure of the material so the races will resist the hardness of the ceramic balls and get the maximum wear potential

  • ABEC-5 rated Ceramic Hybrid bearing with Grade 3 balls
  • Cryogenically treated races will outlast any other bearing on the market
  • Dual lip, groove type seals keep dirt out and 90% fill rate grease in
  • Rheolube special synthetic grease is long lasting and protects against contamination
  • USA made balls are micro-coated with long lasting protection from friction

We back them up with a 1 year warranty.*

DOWNLOAD: BB30-OUT ZERØ CERAMIC HYBRID SHIMANO INSTALLATION / WARRANTY Download PDF File

  • (PRESS-7) Universal Bottom Bracket Press
  • (WRENCH-BB48-44) Wheels Mfg Double End BB Wrench, 16-notch BB tool - 48.5 / 44mm

Note: if your BB shell is slightly oversize, two BB wrenches may be required to fully tighten cups in frame.