Bicycle Mechanics - BB tool 20-spline question

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|3iker
12-01-10, 11:06 PM
Hi,
I have a sealed shimano cartridge splined BB. Can a BB tool use to remove Octalink/Isis type be used? I saw on the Shimano tech doc it seems that the same tool (UN74S) to remove a UN26 can be used for a 105 Octalink type. Therefore I am thinking a splined sealed cartridge shares the same notch format as the Octalink/Isis BB. Please confirm. thanks!

The BB tool in question is this
http://www.filzer.com/products.php?id=40

http://www.filzer.com/img/products/40-lg.jpg

Bezalel
12-02-10, 01:24 AM
The spline interface is the same but Octolink/ISIS spindles are wider than square taper spindles so some older tools designed for square taper won't fit over an Octolink/ISIS spindle.
HillRider
12-02-10, 08:34 AM
The spline interface is the same but Octolink/ISIS spindles are wider than square taper spindles so some older tools designed for square taper won't fit over an Octolink/ISIS spindle.
Right. Park Tool's first version of the BBT-2 tool wouldn't clear the larger diameter Octalink/ISIS spindles but they quickly revised it without changing the model number. The blister pack just had a yellow sticker saying it would fit the newer styles. The current BBT-22 works on all square taper and Octalink/ISIS cartridges.

|3iker
12-02-10, 08:45 AM
I see. So Octa/Isis tool should therefore automatically fit the square-tapered spline BB then because it is larger interior wise. Correct?

thanks.
HillRider
12-02-10, 08:50 AM
I see. So Octa/Isis tool should therefore automatically fit the square-tapered spline BB then because it is larger interior wise. Correct?

thanks.
Yes, exactly.