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[omega2018]

do these rust on the inside like the front ones do?  i plan to replace the pads just wondered if i need to order new discs as well. im loath to do that as i suspect oe disks rust less than new ones.   i can't see the inside face.

[chrisgixer]

Not that I've noticed. Its worth a quick check though.

[TheBoy]

I've not noticed this either. I think the fact that the caliper is 2 opposing pistons helps.

[omega2018]

Not that I've noticed. Its worth a quick check though.

thanks is there some easy way to do a quick check?  it seems the entire inside is covered.  i was assuming i will have to take off the wheel and take out the old pads to know.  im doing that anyway just it will be a pain to do it, put it back together, order the discs and do it all again.

[Nick W]

Rear discs and pads aren't expensive, so if you're that worried about them, why not just buy them before you start the job? I paid about £60 for mine two years ago, and not having to do the job twice would be worth the money for me.

[omega2018]

thanks yes youre right they are £53 for a pair of delphi vented disks. still it all adds up and there are plenty of things on my mig I could replace but don't need it, my feeling is rear disks should last the life of the car if not corroded. also its a bit more work.  if i find the old disks are shiny both sides and i have a pair of new ones next to me the temptation will be to replace then but on the other hand the oem disks are not rusting but the news ones might. my mig doesn't get much use so rust is the big problem, my frontdisks are already shot with rust, inside only.

anyway i'lll take the chance on one wheel, if i find the insides rusted i'll order new ones for both before i  do the second

[Kevin Wood]

I reckon disks last about 2 sets of pads. Since they stopped putting asbestos in the pads they do wear the disks quite noticeably. Check them for thickness if you have any doubt. There's normally a minimum thickness on the disk.