Originally Posted by
Bezalel
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.