Quote:
Originally Posted by hynesd
Hi,
I also have 18inch wheels on my XC90 but all the discs I can source seem to be for 16 and 17inch wheels.
Do you know if the 17inch ones are the correct ones to use?
Regards,
Hynesd
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ALL UK AWD XC90 use the largest disc sizes , the smaller ones are for the USA front wheel drive models ...
Virtualy the whole surface of the disc is swept with the pad , you only have to look at most xc90 discs through the wheel to see this .. sometimes there is indeed a ring of rust around the edge front or rear ,but still the pad is rubbing on this rust but cant clean it up . How the rust got there is probably due to the car being standing for a while with the whole disc rusty then for some reason the pad cant clear the rust from the outer edge .
Volvo's disc & Pad size rating system is crazy and has been for a long long time . The 15 16 16.5 ( america but also relates to 17" wheels on the C70 ) and 17" dont relate to the diameter of the discs or wheel rims ! -
If anyone has managed to find out what this inch measurement relates to i would be happy . i even wrote to volvo technical about 10 years ago and they didnt know the ins and outs of it ...
I would assume at one time the wheel rim size DID relate to the disc size but since 1995 this is not the case .... and no one has had the forethought to amend the parts catalogue and update it so that it makes sense ! Does the swedish language version of the Parts catalogue list inch sizes still ? they went metric in 1974 !