Which bottom bracket

Borderfox

I picked up a 2015 Specialized Roubaix disc frameset with a Praxis bb, I read up and it looks like they use OSBB which (I think) is BB30. I take it I need a BB30- Shimano 24mm bottom bracket to use the Ultegra 6800 crank I have.

I thought I had a handle on most bottom brackets from threaded to bb86 pressfit but now more and needing different removal tools

Sarz91

Borderfox wrote: »

I picked up a 2015 Specialized Roubaix disc frameset with a Praxis bb, I read up and it looks like they use OSBB which (I think) is BB30. I take it I need a BB30- Shimano 24mm bottom bracket to use the Ultegra 6800 crank I have.

I thought I had a handle on most bottom brackets from threaded to bb86 pressfit but now more and needing different removal tools

You could use the following https://www.sigmasport.co.uk/item/Praxis-Works/OSBB-Converter-for-Specialized/3K3C?&co=IRL&cu=EUR&glCountry=IE&gclid=CPn5nOWKu9QCFRGdGwodtgcFcg&gclsrc=aw.ds

You might be able to get it cheaper elsewhere. BB standards are such a load of s****e.

Brian?

Sarz91 wrote: »

You could use the following https://www.sigmasport.co.uk/item/Praxis-Works/OSBB-Converter-for-Specialized/3K3C?&co=IRL&cu=EUR&glCountry=IE&gclid=CPn5nOWKu9QCFRGdGwodtgcFcg&gclsrc=aw.ds

You might be able to get it cheaper elsewhere. BB standards are such a load of s****e.

Calling them standards is a joke.

Borderfox

The Praxis on in it needs a different tool to remove also and I've no idea what the rotor or praxis replacement one will need. It makes pressfit look handy

clog

Are you sure that the Praxis is not already a 24mm adapter. They are not normally standard.

Borderfox

It's a 30mm at the moment

nilhg

I replaced the BB30 in my felt with a Wheels Manufacturing one, use the standard Shimano tool to fit, bearings are replaceable if needed.

http://wheelsmfg.com/bottom-brackets/bb30-outboard/bb30-outboard-bottom-brackets.html

PaulieC

I got a BB30 crankset (FSA Gossamer 46/36) swapped out for a Shimano 105 compact in CCS last Saturday. Including the adapter, BB and crankset, the cost was less than 200 euros.

Borderfox

Ended up getting a Rotor 30-24 bb, got Peter in Base2Race to remove the praxis one. Rotor was handy enough to fit using 2 shimano tools

joey100

How are you finding it? I recently got a specialized bike with the osb bb converted to take shimano hallowtech too, pretty sure it's a FSA adapter, I've never heard as much creaking from a bike in my life.

Borderfox

Haven't built the bike yet, so many different things to a regular road bike