Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Praxis BB30 Conversion torque?

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Praxis BB30 Conversion torque?

Old 03-29-22, 09:02 AM
Junior Member
Thread Starter
Join Date: Oct 2011
Location: Dallas, TX
Posts: 94
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 26 Times in 14 Posts
Praxis BB30 Conversion torque?

My wife's Specialized Ruby was making clicking sounds from the BB, so I removed the cranks and the right hand BB cup was loose (I could unscrew it by hand). This is a Praxis BB30 conversion, where the left hand side BB cup, together with the metal sleeve, is pressed into the frame. Then, the right hand cup is screwed into the sleeve on the other side. Not having the proper BB tool, I took it too my LBS and asked them to screw it in to the the proper torque. Well, according to the mechanic, the proper torque is "as hard as I can tighten it", so this is what he did. Skeptical, I looked it up, and apparently he is correct. According to this, one tightens the right hand cup "until it stops", whatever that means. I've seen some numbers thrown out for BB cup torque like 40-50 Nm or so. For now, it seems to be OK, but I suspect it will loosen itself again in the future, so I will have to tighten it again as hard as I can. I would be nice to have a torque specification, however. Does anyone have experience with this BB?

hayden52 is offline  
Old 03-29-22, 10:26 AM
Senior Member
cxwrench's Avatar
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767

Bikes: lots

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1953 Post(s)
Liked 2,923 Times in 1,487 Posts
Yep, a bunch of grease and tighten the **** out of it.
cxwrench is offline  
Likes For cxwrench:
Old 03-29-22, 12:41 PM
Heft On Wheels
sdmc530's Avatar
Join Date: Nov 2014
Location: South Dakota
Posts: 3,124

Bikes: Specialized,Cannondale,Argon 18

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 887 Post(s)
Liked 560 Times in 346 Posts
grease or anti seize on the threads and the Factory number for BB is 40 nm. But yeah they have issues becoming lose overtime. So I have been going mores so to 50 nm and have had better results. My Argon 18 has their carbon crankset and when I put that in the bb got 55 nm and the cranks got the same. No issues so far.
sdmc530 is offline  
Old 03-29-22, 06:01 PM
Senior Member
Join Date: Apr 2007
Posts: 5,995
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 791 Post(s)
Liked 738 Times in 472 Posts
I installed one a couple of years ago, so my memory is a little vague. But I do recall what was written above - there is a "hard stop" when you tighten that side. Not a torque number, but tighten it until it stops. Mine has been silent and tight since.
Camilo is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.