[crouchingtiger]

I need some advice on disc brake pads. my pads are not stopping me as well as I'd like unless i really squeeze them, and if i do that they make that loud screeching sound. should I just get new pads or is it something more simpler. thanx for the feedback

 

[bean]

is there any pad left? if you've worn away the material, you could be down to metal on metal, which doesn't work well until it starts digging in and makes a lot of noise.

Otherwise, maybe they're glazed? Have they overheated at some point?

 

[crouchingtiger]

ya i think they may have over-heated. ironically that's when they started not working.

 

[crouchingtiger]

if they are glazed what can i do about it

 

[JeffKill]

Clean the pads with rubbing alcohol, lightly sand them with fine sandpaper, then clean with rubbing alcohol again. Do the same thing to your rotors also.

 

[crouchingtiger]

thanx hopefully that works. also would you happen to know what would make my rear derailleur not shift out of the fifth ring. I either have to be going over bumps or push the chain around with my foot.

 

[JeffKill]

Could be a number of things causing shifting problems. Anything from a bent hanger or derailleur to just cable tension. If it's having trouble shifting up to a bigger cog, try more tension and if it hesitates to go to a smaller cog try less tension. If you have a rapid rise derailleur, reverse that theory. What rear derailleur do you have?

 

[crouchingtiger]

shimano alivio. it has trouble doing both but only going from the sixth and the fifth ring