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Are all 9 speed DA and Ultegra cranks Octalink?(10 posts)

Are all 9 speed DA and Ultegra cranks Octalink?Fez
Aug 22, 2002 9:35 AM
I read about Octalink and Shimano. But weren't they making this stuff for a few years and then they finally came up with the name?

Specifically, weren't 9-speed DA and Ultegra cranks splined before they came up with the Octalink name? The newer Ultegra cranks come with the Octalink lettering on them, although they appear to be the same crank as before.

I do believe there was a non-splined 9-speed 105 crank and then it got the upgraded to hollowtech/splined design.
Shimano has been splined for quite a few years now.elviento
Aug 22, 2002 9:38 AM
The new ones with "Octalink" label seems to go on pre 2002 BBs just fine. Whether it's different from pre 2002 cranks, I don't know. Someone answer this?
The last tapered DA cranks....Dave Hickey
Aug 22, 2002 9:41 AM
Were the 7410 model. They were 8 speed and were know as the low-profile cranks. They required a 103mm BB. All 7700 series DA cranks are splined.
In answer to your question.....Dave Hickey
Aug 22, 2002 9:45 AM
DA and Ultegra Splined BB's and Cranks are all compatible.
so the "Octalink" is nothing new; just a belated label toFez
Aug 22, 2002 10:18 AM
indicate the industry standard so that it is compatible with other manufacturers' octalink stuff?
so the "Octalink" is nothing new; just a belated label toDave Hickey
Aug 22, 2002 10:54 AM
To be honest, I cannot say if they are compatable with other manufacturers. Someone correct me if I'm wrong, but I think there are two standards for spline cranks. One is Octalink and the other is ISIS. One would assume all Octalink cranks are compatable. Check FSA's(fullspeedahead) website. I think they explain the difference between Octalink and ISIS
Even Shimano mountain cranks .Spoke Wrench
Aug 22, 2002 11:07 AM
The mountain cranks (except XTR) used to use a different spline pattern. Is that changing this year?
Yup, you're right.Leisure
Aug 23, 2002 3:34 AM
ISIS and Octalink are not compatible to each other, and are basically the two major spline standards. It was probably the creation of the ISIS standard that prompted Shimano to finally be willing to license their spline design under the Octalink moniker to other companies. Before that, Shimano was keeping their spline design exclusively to themselves in their ongoing effort to monopolize the component market.
ISIS doesn't seem to be as big in road bikes yet, as there are fewer competitive Shimano alternatives. But it's popular enough in mtbs. I've got it on my Rocky Mountain full suspension and like it a lot, enough that I'll be sticking with it if I get FSA's carbon road cranks.
Aug 22, 2002 1:29 PM (nm)WingWing
Aug 22, 2002 1:31 PM