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Fork/HTA/Lower Cup Geo Question?

rideit

Bob the Builder
Aug 24, 2004
19,162
8,599
In the cleavage of the Tetons
So, early this year, Rocky used 10mm ‘extended’ lower cups on most of their bikes (supposedly due to some supply line issues?).
Dumb Q here…if they feel that geo is optimized with the extra 10mm and a 170mm fork, why wouldn’t I just want to run a 180mm fork, and ditch the lower cup for a normal one?
I can’t see why not, but I might be missing something here.
Thoughts?
Try it Nao?
 

Andeh

Customer Title
Mar 3, 2020
699
699
Technically a 180mm set at x% sag will feel squishier than a 170mm + 10mm cup at the same x% sag, and sit a bit lower.

Were they using the external cups because they couldn't get ZS cups, or because they couldn't get 180mm forks?
 

rideit

Bob the Builder
Aug 24, 2004
19,162
8,599
In the cleavage of the Tetons
Zs cups, from what I understand. But it made no sense to me, in my thinking, all of the Geos would be off, the HTA by about 1/2 a degree. I guess people liked them just fine like that.
 

Udi

RM Chief Ornithologist: “I Brake for Birds”
Mar 14, 2005
4,901
1,170
Just make sure the fork won't hit the down tube if you swap the extended cup for a ZS.