Front Brake Disc (Acceptable Thickness)

[alastair_drake]

Recently changed my rear pads as one of them had some how knackered!! A chunk had been taken out one of the passenger side pads, which was strange, but changed them anyway thinking that was why my brakes were poor! Whilst changing the rears I also realised that (1 of the 4) of my front pads has worn a lot thinner that the rest and is now almost down to the metal!


Looking to change them ASAP and was wondering if anyway knew what was the acceptable thickness of the front discs were so I can gauge if they need changing too. The front passenger disc has a slight lip to it (probably 2mm at most) and the drivers side isn't as bad (probably 1-2mm).


Do I need to change the discs too? The car has only done 27k and the brakes seem to feel poor. I don’t drive the car particularly hard and I don't believe the chap before me did either. Is it probably due to the one pad thickness being very thin as effectively only 3 pads are in operation? Or are my discs knackered?


Sorry if this seems like an essay or is confusing!


Al

 

[edde]

Fron's have a minimum thickness of 21mm or so (24mm new) If they have any decinet lip on them chnage them though.
Sounds like the pads arn't sliding best take them off clean the caipers and sliders and bleed the system with some new fluid as that should sort most problems.
All the pads should wear about evenly about 0.5~1mm maximum I'd say between the worst and best pads in thickness as its just the way they are.

 

[fizzy_drink]

The lip on your front disc:

Is it on the inside, or outside of the disc?


The lip on the inside is always bigger than that of the outside (sliding caiper design).

Make sure you check both.

 

[alastair_drake]

I've only checked the outsude of the disc to be honest. I assumed they would be pretty symetrical but thanks for the advice - I'll have a look and also check the disc thickness while im at it!!

Would changing the front discs be a similar job to changing the rears as I've managed to get hold of a user guide to change the rears!!

Also any ideas of price on genuine Renault front discs? I'm guessing around £60 per disc TBH. Not really fussed about uprated Brembos etc as I want the car to look as standard as possible.

Cheers

Al