If you read the little piece of paper that comes with your konis (small and easy to lose), it says there is one full turn from softest to firmest (Atleast thats what mine said). Even though you may be able to turn the adjuster past the 1 full turn mark to make it firmer like I can too, persoanlly I wouldn't recommend doing that as who knows what it could do to the internal valving and seals if you hit a large bump.
