Just a heads up the dealer who sold my car had fitted aftermarket Stormer style 20" alloys. When one was pulled off we found that they were rated to max load of 665kg which in Aussie makes car unroadworthy and illegal. Dealer when confronted with this replaced them with again aftermarket Stormer alloys, these have 815kgs max load which is ok. So there are out there rims for RRS at incorrect load rating. Be careful when buying as most tyre/wheel dealers I have met don't know/care what they are fitting.
Meccles SWMBO owns this car I get to drive occasionally

815kg is still low so take care with potholes etc.

Anything less than 950kgs would worry me RRS gone
Audi SQ5...Gone Audi Q7 S-Line 240 3.0TDI Gone
Audi A6 Allroad Sport 270 3.0TDI

awd man wrote:

Anything less than 950kgs would worry me

The standard 18" rim is rated at 940kg - so I guess you are worried  07MY RRS TDV6
Arctic Frost
Aspen Interior

with the 18 you have a lot of tyre wall to cushion any sudden impact.. when you're up to 20 (and especially 22) the rim needs to be stronger...  RRS gone
Audi SQ5...Gone Audi Q7 S-Line 240 3.0TDI Gone
Audi A6 Allroad Sport 270 3.0TDI

Am waiting from reply from LR Austraila as to what is the "official" minimum rating for the rim. The original LR 20" spare rim has 860 kgs max load stamped on it. SWMBO owns this car I get to drive occasionally

This makes me laugh every time I see one of the latest fashion vans that builders, plumbers & chippy's are driving these days a.k.a the VW T25..........fitted with Golf R32 wheels = insurance null and void, same pcd as the RR I do believe. 08 2.7 RRS "S"
Td5 110......very modified
RS 5
Kawasaki ZX12R me, it's quick !

Dealer has done their own investigation, end result is that new genuine LR Stormer rims are on order from UK.
The dealer was pretty good to deal with, once all details etc were known they have been pretty quick to act. They have done the right thing. SWMBO owns this car I get to drive occasionally