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Identify this Bottom Bracket

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Identify this Bottom Bracket

Old 07-24-16, 12:04 AM
  #1  
zoom996
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Identify this Bottom Bracket

https://i.imgur.com/wHDHDWa.jpg

This is a bottom bracket I've never seen. I'm trying to remove it but I'm familiar with only the square taper style of BB.

https://i.imgur.com/wwmYsn9.jpg

This is the bolt that comes out of the crank arm.

What tool to I need to remove the crank arm and the bottom bracket?
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Old 07-24-16, 12:37 AM
  #2  
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Can you zoom out a little bit so we can see some more of the crankset?

What kind of bike is this? Maybe it's the original crankset and we can look it up.

Are there any markings on the crankset? Maybe on the back of the crank arms?
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Old 07-24-16, 12:57 AM
  #3  
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looks like shimano octalink.
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Old 07-24-16, 08:01 PM
  #4  
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https://i.imgur.com/NZ25E8H.jpg

https://i.imgur.com/TwsF0ck.jpg

It's not the original bottom bracket. These are two more shots.

Thanks for the help guys.

Last edited by zoom996; 07-24-16 at 08:12 PM.
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Old 07-24-16, 08:26 PM
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I think Soil_Sampler nailed it, but you can confirm by looking up the model number of the crankset (stamped on the back side of the crank arms). Not that you'll need to confirm, really... It's a modern Shimano crankset and it's not square taper or Hollowtech II, which doesn't leave many options other than Octalink. There are multiple Octalink versions, which may come into play when selecting a replacement bottom bracket or crankset, but installation and removal of both Octalink versions are the same.

Removal is very similar to square taper. The most notable difference -- practically the only difference -- is that the crank remover you use needs to have the proper diameter for splined spindles like Octalink or ISIS. Some crank removers like the Park Tool CWP-7 are reversible; one side does square taper, the other does splined cranks.

Last edited by SkyDog75; 07-24-16 at 08:32 PM.
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Old 07-24-16, 08:43 PM
  #6  
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Originally Posted by Soil_Sampler View Post
looks like shimano octalink.
YEP, what say too...
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Old 07-25-16, 05:59 AM
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Can't really see the bottom bracket until you remove the crankset. So far you've posted photos of the cranks, the crank bolt, and a lot of unfocused pics of the same. The only part of the actual bottom bracket I've seen so far are the retainer ring and the shoulder on the drive side.
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Old 07-25-16, 07:23 AM
  #8  
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If you are close to one go to your LBS, have them pull it off, rather than buy or use the wrong puller, you only do it wrong once then you really have an issue, as mentioned above most pullers have removal or reversible insert for the different types.
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Old 07-25-16, 02:15 PM
  #9  
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There's always the dimes trick if you're not afraid of defacing currency.
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Old 07-26-16, 11:34 PM
  #10  
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I'll try the dime. I think you mean use a regular crank arm puller and put a dime in front of it?
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