Replacing BB30 bottom bracket

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cookie_monster72
Posts: 10
Joined: 4 Jun 2016, 2:56pm

Replacing BB30 bottom bracket

Postby cookie_monster72 » 11 Dec 2018, 5:43pm

Is it easy to do? Having watched a couple of videos it seems I might additionally need to buy a couple of tools so might be cheaper (and quicker) to put it in to my LBS

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Valbrona
Posts: 2171
Joined: 7 Feb 2011, 4:49pm

Re: Replacing BB30 bottom bracket

Postby Valbrona » 11 Dec 2018, 7:08pm

Simplest job on a bike, but you need some kind of tool to remove the old bearings as well as some kind of tool to seat the new ones. There are a number of simple bearing presses on eBay which do the job just fine.
I should coco.

cookie_monster72
Posts: 10
Joined: 4 Jun 2016, 2:56pm

Re: Replacing BB30 bottom bracket

Postby cookie_monster72 » 11 Dec 2018, 7:13pm

Valbrona wrote:Simplest job on a bike, but you need some kind of tool to remove the old bearings as well as some kind of tool to seat the new ones. There are a number of simple bearing presses on eBay which do the job just fine.
Thanks mate. Found a great video which shows how to do it on the exact same model bike I have. Like you say, just need the tools!

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Valbrona
Posts: 2171
Joined: 7 Feb 2011, 4:49pm

Re: Replacing BB30 bottom bracket

Postby Valbrona » 12 Dec 2018, 2:34am

Note that with 'proper' BB30 two cartridge bearings sit inside the BB shell - no cups.

The other style is Press-Fit 30. This is where the bearings are retained in cups which get pressed into the BB shell.

Both styles take a BB30 crank.
I should coco.

cookie_monster72
Posts: 10
Joined: 4 Jun 2016, 2:56pm

Re: Replacing BB30 bottom bracket

Postby cookie_monster72 » 20 Jan 2019, 12:38pm

So got all the tools and bracket etc to do this repair, and faced with the image below. I'm assuming the ring with teeth is something I need to remove to get to the bottom bracket. Pardon my ignorance but I'm trying to educate myself and do more repairs but can't find the manual for my particular model bike (cannondale synapse alloy from around 2013)Image

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cookie_monster72
Posts: 10
Joined: 4 Jun 2016, 2:56pm

Re: Replacing BB30 bottom bracket

Postby cookie_monster72 » 20 Jan 2019, 1:40pm

So I now think this is a threaded bottom bracket with a square tapered axle. Anyone know how to remove it? And can I use the bb30 I've bought to replace it?

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iandusud
Posts: 184
Joined: 26 Mar 2018, 1:35pm

Re: Replacing BB30 bottom bracket

Postby iandusud » 20 Jan 2019, 2:35pm

That's not a BB30, it's a cartridge BB. You will need the tool to remove it and fit the new one. Not at all expensive such as this one for a fiver.

https://www.chainreactioncycles.com/cyc ... prod172561

Note the thread on the r/h side is a left hand thread - that is you turn it clockwise to undo it.

Ian

P.S. The axle on the replacement cartridge should have the same overall length.

cookie_monster72
Posts: 10
Joined: 4 Jun 2016, 2:56pm

Re: Replacing BB30 bottom bracket

Postby cookie_monster72 » 20 Jan 2019, 2:38pm

iandusud wrote:That's not a BB30, it's a cartridge BB. You will need the tool to remove it and fit the new one. Not at all expensive such as this one for a fiver.

https://www.chainreactioncycles.com/cyc ... prod172561

Note the thread on the r/h side is a left hand thread - that is you turn it clockwise to undo it.

Ian

P.S. The axle on the replacement cartridge should have the same overall length.
Thought so. Cheers!

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squeaker
Posts: 3472
Joined: 12 Jan 2007, 11:43pm
Location: Bramber, West Sussex

Re: Replacing BB30 bottom bracket

Postby squeaker » 20 Jan 2019, 6:19pm

IME holding the tool in place as shown here (scroll down) can save a lot of grief if the metal / plastic rings are tight. (If the crank spindle is solid then a crank retaining bolt will usually work with a few washers.)
HTH
"42"

Brucey
Posts: 32690
Joined: 4 Jan 2012, 6:25pm

Re: Replacing BB30 bottom bracket

Postby Brucey » 20 Jan 2019, 6:27pm

cookie_monster72 wrote:…... And can I use the bb30 I've bought to replace it? .....


I think the answer to that is 'no'.... if it is BB30, that is.... :wink:

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

iandusud
Posts: 184
Joined: 26 Mar 2018, 1:35pm

Re: Replacing BB30 bottom bracket

Postby iandusud » 21 Jan 2019, 1:19pm

squeaker wrote:IME holding the tool in place as shown here (scroll down) can save a lot of grief if the metal / plastic rings are tight. (If the crank spindle is solid then a crank retaining bolt will usually work with a few washers.)
HTH


You're quite right and it's worth trying to source a removal tool that is quite shallow to allow the use of a crank bolt.

Ian