ok, i finally got the replacement just in 3 days after contacting mayhem...
i finally installed and remove the lip that Ron said.
Anyway, I notice the tire have some "standing hair", which are touching the chain. What does this hair do? Should I better get rid of it or not?
and, there is a plastic piece inside the crank house, which according to the tutorial video as "black plastic rubber chain rubbing strip" and hard to fit it in. What is the effect by removing this plastic strip? Or what it's function?
btw, i finish replacing the chain, but now it have funny sound like something is loose and clanking sound. What is the cause of this?