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Old 08-17-07, 06:14 PM   #1
Plainsman
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Installing an Octalink BB

Do I need 2 different tools to install a 105 series Octalink V1 BB and cups? The tool I have is the Nashbar BB tool with 20 grooves. I only know outboard bearing stuff, so this is new (though older tech) to me.

Thanks!
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Old 08-17-07, 06:54 PM   #2
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That's the correct tool.
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Old 08-17-07, 10:27 PM   #3
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Great, thanks.
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Old 08-18-07, 08:45 AM   #4
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Clamp the bb tool to the cup by running your qr skewer through the hole in the tool and the hollow spindle. That way you can apply a lot of torque without the tool slipping out of the splines.
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Old 08-18-07, 09:33 AM   #5
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Depending on the tool, you may need to invest in a large washer with a small hole.
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Old 08-19-07, 06:35 AM   #6
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I've never had to do the clamping thing. Just be careful to keep the wrench square to the frame.
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Old 08-19-07, 08:41 AM   #7
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I've never had to do the clamping thing. Just be careful to keep the wrench square to the frame.
The clamp assures you do keep the tool square despite applying a LOT of torque to remove or replace the bb. I've always found it reassuring to use the qr and it costs nothing.
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Old 08-20-07, 06:47 AM   #8
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if it's out board bearings,make sure you "face"the bottom bracket!
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Old 08-20-07, 08:57 AM   #9
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if it's out board bearings,make sure you "face"the bottom bracket!
Octalinks are not external bearing bb's.
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Old 08-20-07, 11:21 AM   #10
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Thanks for all of the advice, this Octalink deal sounds like a slightly more complicated procedure than installing a Hollowtech II or MegaExo BB. From an above post, it sounds like the bargain socket type tool that came in my Nashbar tool kit will do the trick, but is the tool the same for ISIS and Octalink splined BBs? (And as a side note, I was wondering, is ISIS a word that you pronounce, like (Ice-iss), or is it just an acronym that you always spell out. I don't even know what it stands for.
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Old 08-20-07, 04:40 PM   #11
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The Park BBT-2 fits both Octalink and ISIS bottom brackets so the Nashbar tool should also.

ISIS is an acronym for "International Spline Interface Standard." It is a public domain design intended to provide a splined crank interface like Shimano's patented Octalink but not require a license from Shimano. I also pronounce it as a word (Eye Siss) but it originated as an acronym.

For those who really want the minutae of the ISIS design, here is a .pdf giving all of the gory dertails:

http://www.isisdrive.com/isisdrive/I...ument_revD.pdf
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