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This is our M30 BB for installing a Praxis M30 crank into a BB86 Road frames, a BB90 MTB frame or BB92 MTB frame.

  • For Praxis M30 spindle based cranks only.  NOT for other 30mm cranks
  • Used only for frames that are  BB86 ROAD  |  BB90 MTB  |  BB92 MTB
  • Unique all in one design in which the bearing outer race is also the outer press fit surface
  • Chromium steel design.
  • Steel Bearings |  30mm Drive bearing /28mm NonDrive bearing
  • Before installing, you must use Praxis frame Gauge to check your frame.
  • BB86 Road/BMX = 86.5mm width X 41mm diameter   
  • BB90 MTB = 89.5mm width X 41mm diameter (*NOT Trek Road BB90!)
  • BB92 MTB = 92mm width X 41mm diameter
  • Install Guide pdf_icon


  • Unique all in one design in which the bearing outer race is also the outer press fit surface


Praxis Works warrants components to be free from defects in materials or workmanship for a period of 2 years after original purchase. However, there are limitations as “nothing lasts forever” so please read our Warranty page for details.


FED EX – We ship globally with Fed Ex and charges are calculated in your shopping cart at checkout. Note: We do not ship to international countries where we have a full service distributor. Please see our list of International Distributors.

30 DAY SATISFACTION GUARANTEE – Here at Praxis, we’re a core group of riders we 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.

RETURNS – If within 30 days of original purchase please call Praxis Works customer service at 831-423-7464 or email sales@praxis-works with your order number and our reps will be glad to setup a refund RA for you. Customer is responsible to ship/insure the product by a trackable source because if lost or damaged Praxis will not refund. Please do not return any item directly to Praxis unless an RA has been provided by a Praxis rep. Once product is received and checked in at Praxis, your warranty/refund will be processed immediately and you will be notified. No returns are accepted after 30 days.

EXCHANGES – Exchanges are not available. A full return with explanation will be needed, and a new transaction for correct product will be processed. Please call Praxis Works for issues regarding product mislabeling, miss-shipping, or if you simply ordered the wrong product.

SKU: 86-4001B M30 BB86


For installing a Praxis M30 Spindle based Road crank  in BB86 ROAD FRAME

For installing a Praxis M30 Spindle based MTB crank in BB90 MTB or BB92 MTB FRAME

Additional information

Weight1 lbs
Dimensions2 x 2 x 4 in
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