I would welcome some advice on my spare wheel and tyre. I’ve searched for answers elsewhere but so far drawn a blank.
I have a 2012 Range Rover Sport 3.0 SDV Autobiography (L320). Following an encounter with a pothole the front nearside wheel rim will need to be repaired. Upon fitting the spare for the first time I was surprised to discover that my spare wheel/tyre combination was a completely different size to the wheel/tyre it was meant to replace. The whole car's lopsided!
I assumed that someone had replaced the spare with the wrong combination so I looked up replacements online – only to see my spare wheel/tyre combination listed as ‘standard’ for my model. That can’t be right, surely?!
So my questions are:
1. (Ultimately) what spare wheel and tyre combination should I fit?
2. (Out of interest) what is the standard spare? Is my spare rim size correct but tyre size wrong, for example?
My spare rim looks like a standard Range Rover spare (see image). It’s fitted with a Continental T175/80 R19 122M (which implies that the rim is 19 inch).
The wheel it replaces is a 20-inch nine-spoke ‘Style 10’ rim fitted with an Avon 275/40 R20 tyre (which I know most definitely is standard).
BTW Although I’ve fitted the spare, I’m not moving the car an inch for obvious reasons!

I've got the same with my 06 rrs got 20 inch rims and a 19 for a spare and the rim is painted black so you know it been changed it just a stop gap to get you to a garage to get the flat wheel replaced or repaired

The problem with using it even for a short journey to the nearest garage is that the difference in wheel/tyre circumference will surely play havoc with the diff? Besides, when touring in remote areas the nearest garage may be miles away.
What I find surprising is the prospect of a car fitted with 20-inch OEM wheels being sold with a 19-inch spare.

has your got a max speed limit on the spare?
mine is 50 mph I presume it like you said so it don't pull the diff out

That is a space saver wheel/tyre combination and was standard fitting spare on my MY13 A/B from the factory, there will be very little difference in overall diameter/circumference due to being 80 profile. It also came with the same "style 10" rims as yours as they were originally only available on the 12/13 A/B's. Just buy a spare single matching rim and tyre size to use as a spare, or any Sport 20" 9.5J 53mm offset rim for that matter, it will fit in the spare wheel well with no problem.

Cheers
Col

I think a 19" spare is standard on earlier cars even with 20" road wheels fitted so landrover must have method in their madness. I may be wrong the way I explain this but,,,,, what you have to take into account is the rolling circumference of the wheel / tyre package. If your road wheels are 20" with 45 profile rubber,, there will be little or no difference to your spare 19" with 55 profile rubber. General rule of thumb,,, bigger the rim,, less rubber between the rim an ground, smaller the rim,, more rubber. This is why a lot of people don't like 22" wheels as it like doing with no rubber on the rim!.

The spare is only a get you home option which is why they are rated at lower speeds. 2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it

thanks for that

AndyOn4Wheels wrote:

The problem with using it even for a short journey to the nearest garage is that the difference in wheel/tyre circumference will surely play havoc with the diff? Besides, when touring in remote areas the nearest garage may be miles away.
What I find surprising is the prospect of a car fitted with 20-inch OEM wheels being sold with a 19-inch spare.

Really helpful - and reassuring - replies. Thank you all.
Does anyone have the formula for calculating the rolling circumference, please? Maths was never my strong suit!
Obviously I can put a string around my 20" wheels. I'm just not sure how to calculate what tyre profile I'd need to fit to a 19" rim to match.
Col: Your suggestion to fit a matching Sport 20" 9.5J 53mm offset rim may be the simplest option. Is its weight a consideration?

Something like this? https://tiresize.com/tyre-size-calculator/ 2023 P440e SE Dynamic on order -cancelled

2022 HSE Dynamic P400e

2017 Discovery 3.0 HSE Silicon Silver Nimbus interior and a few extra toys SOLD

2013 HSE Black, Orkney Grey, Ebony Seats and Ivory Interior SOLD

2006 HSE

Plus a few other cars inbetween!

Andy, the formula is Pi x D. Measure the outside diameter then multiply it by 3.142 (which is Pi)  Range Rover Sport (gone): Mercedes S63 AMG Coupe: 992 Porsche Carrera 4S: Range Rover Fifty P400e

Weight of full size spare would not be a issue as you could spec. the car with a full size spare originally. Don't know if you can fit a full size tyre to a space saver rim due to the rim width being 5.5J, but If I remember correctly the tyres fitted to a Sport with 19" rims were 255/50 x 19". Easiest option is just buy a s/h full size wheel/tyre plenty on fleabay. I did get it wrong in my original reply, my car had the later style durable spare as that is what is supplied with the S/C, it reminded me of a black Disco 3 style five spoke wheel for some reason, the one I was actually thinking of was on a previous sport.

Click image to enlarge

I assume the durable spare tyre size is an error. It says 255/55/19 but should be 255/50/19. 255/55/19 is the Disco tyre size. I run 255/55/19 on my RRS, however, and have done for years. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Then the alloy space saver size is also wrong as the overall diameter of both 175/80 x 19 and 255/55 x 19 are the same 763mm. However I really can't remember what size was fitted to mine. Being L/R cheapskates perhaps they used the same size spare for both Sport and Disco.

Click image to enlarge

Knowing LR, it'll be a cost saving thing or a simple mess up. Both are equally typical LR.

RRS standard 19 inch tyres are 255/50/19. Putting a 255/55/19 spare on the vehicle is just mad. So probably is a mistake by LR. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed