New to MTB'ing so I know nothing when it comes to these things.
It looks like the rotor is slightly warped on the front. Even when I turn the red knobs on each side all the way out the rotor still rubs in one spot and there's a visible wave in it. However, it doesn't appear to be that bad. Currently the rotor is up against the one side - not centered - and I don't know how to fix this. So...
1) How do rotors get warped in the first place? Can they be fixed? Do I need to buy the exact Avid rotor is there others that will work just as good?
2) How do I adjust the centering of the rotor? Is it with the #1 and #2 bolts? That looks like a torx bolt but it has a dot in the middle. What tool works on that?
3) What is the tiny #4 hex bolt for?
Sheesh, I thought working on my roadie was confusing.
