Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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Hollowtech I used Octalink cartridge-type bottom brackets with a hollow splined spindle built into the cartridge, V-1 for road cranks and XTR and V-2 for most other MTB cranks and Tiagra and Sora cranks.
Hollowtech II uses external cup bottom brackets with the spindle as part of the crank arms. They are not at all interchangable.