Treads ,just did my idler bearing replacement make sure you have your sense of humor when you attempt circlip removal can be tricky to get out .
When you do get it increase the angle of the bevel to make it easier next time.
On the parts cost side of things just got my belt for $44 along with service pack filters etc and then had them posted to me postage $6:D saved 50 to 60 bucks just by ringing around! If ya have time that is!

