Why do some 2007 Orcas have a little blue piece of aluminum near the chainrings? Is it to prevent chainsuck? Some have them and others dont. Why?

Is there a place for barrel adjusters with the 07 model? The headtube does not allow for these to be installed.....are they just not installed at all? How to fine tune shifting?

Thanks,

The blue piece does not prevent chain suck but will protect the chain stay if it does happen. I guess people remove them because it doesn't look very nice.

In place of barrel adjusters, you can add in-line adjusters to the derailleur cables for fine tuning the derailleurs.