M30–BB30/PF30 73mm MTB


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This is our M30 BB for installing Praxis M30 MTN cranks into 73mm BB30/PF30 MTN frames.



  • Only for Praxis M30 spindle MTN cranks being installed on a 73mm BB30 or PF30 MTN frame
  • 30mm Drive bearing / 28mm NonDrive bearing | cartridge bearings
  • Ceramic version is Grade 5 / ABEC 5 rating
  • Forged & machined heat-treated AL Cups
Square M30 Hand


FRAME TYPE : This specific M30 bottom bracket is made to be Pressfit into BB30/PF30 73mm MTN Frames.

BEARINGS : Praxis M30 bottom brackets have a 30mm Drive and a 28mm NonDrive Bearing.  These are specifically made for use with our Praxis M30 spindles.  A drive-side wave washer is used for preload of the bearings.     

TOOL : This specific M30 bottom bracket requires two of our M30 socket tools along with a press tool/drift for installation.  Please read the instructions carefully for installation.   M30 Tool 2pk kit here




Praxis warrants components to be free from defects in materials or workmanship for a period of 2 years after original purchase to the original owner. 

However, there are limitations such as normal wear and tear…as “nothing lasts forever” so please read our full Warranty.



PROCESSING –  Orders placed after 12:00pm M-F are processed/shipped the next business day.  Also, any orders placed over a weekend or holiday will be processed and shipped the next business day.  We ship with Fed Ex and charges are calculated in your shopping cart at checkout.

30 DAY / RETURNS – At Praxis, we are a core group of riders that believe you should be completely satisfied with the purchase you have made. Should an item purchased through the Praxis Online Store fail to meet your expectations, we will gladly accept its return within 30 days of original purchase date.  WEB RETURNS