can someone tell me what is the correct size spare for my RRS tdv6 2008 on the car are 255/55/20 but the spare is 255/50/17 ? would i be able to use this in the event of a puncture ??,

I wouldn't, your current tyre diameter is 31", your spare 27", so I would expect the car to throw a hissy fit.

Dave 2010 3.6 TDV8 HSE (Gone)
2011 Discovery 4 Commercial SDV6 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)

Kev H wrote:

spare is 255/50/17 ? ?,

are you sure

a 17" wheel sounds wrong with that tyre size, you should use a wheel tyre combination that matches the same size radius
it does NOT have to be the same size (255/55/20) but should match and a 255/55/20 has a radius of 394mm

dont think your size is a standard fit size either 255/50/19 369mm could have had 255/55/19 (G4's had them) 382mm



edit. you could fit a 245/75/17 to that wheel to get a radius of 400mm so +6mm but I would check it actually fits on your car first and clears the brake calipers

. Porsche Cayenne 2022
gone Porsche Cayenne 2020
gone Corris Grey HSE Dynamic 2016
gone Ipanema HSE lux 2010
gone Rimini HSE 2005
!!

I think you would actualy struggle to get a 255/55 x 20" fitted under the car, I did manage to get a 275/45 x 21" in there but vert tight needed to use a Dremel to smooth a couple of welds off, and that according to some tyre size sites it is 781mm diam. and the 55 profile is 789mm.

Cheers
Col

While the base D3 came with 17" rims, I dont think 17" were ever fitted to the RRS as standard. So your spare is not original. As others have said the diameter difference is too much and will cause issues if used. Why not get a wheel and tyre combo the same as fitted in your car to use as your spare - you will have to leave it deflated to fit in the wheel well and carry a means of inflating it if needed. 07MY RRS TDV6
Arctic Frost
Aspen Interior

Kev H wrote:

can someone tell me what is the correct size spare for my RRS tdv6 2008 on the car are 255/55/20 but the spare is 255/50/17 ? would i be able to use this in the event of a puncture ??,

He has a TDV6 not a TDV8 so 17" rims will fit. 07MY RRS TDV6
Arctic Frost
Aspen Interior

Ah, misread that. Mea culpa! 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

A big thanks to all of you that replied with advice and it is now clear my 17inch spare is about as much use as a rubber ladder, but before i go and buy a 255/50/19 for the spare can any one confirm it will definetly fit underneath my car inflated ?,

At 29" overall diameter it is less than my 275/45x21 by a little over 1 1/2"s, so I would say yes it will fit.

Dave 2010 3.6 TDV8 HSE (Gone)
2011 Discovery 4 Commercial SDV6 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)

Hi,
it will certainly fit its the standard size (I had the same size)
BUT
why would you buy one as it does not match the size you say is on your car so its still NO GOOD to you as a spare

A tin of gloop would be much cheaper and actually be of some use

 Porsche Cayenne 2022
gone Porsche Cayenne 2020
gone Corris Grey HSE Dynamic 2016
gone Ipanema HSE lux 2010
gone Rimini HSE 2005
!!

Thanks for all your input i have now got a 255/50/19 spare and it does fit under the car and i know it is not the same size as the 255/55/20 that are on the car but surely the 19" is ok as a emergency get me home ??

I wouldn’t, all wheels should be doing the same rpm, near enough, you will have one that will do doing quite a bit more so you will risk damage to your diff and possibly transfer box. Whilst they are made to do different speeds, it is normally marginally different, or for short periods, not continuously Joined the X5 45e club
1994 Defender 90 300 tdi

Hi,
agree with Dave-T there is a 25mm difference in the Radius doubt the car will like that if you do use it,

to be honest you may have well stopped with the 17" rather that buy a 19" its not the size of the wheel that matters its the overall size

you could have bought a second hand tyre to go on the 17" wheel and it would have matched then

 Porsche Cayenne 2022
gone Porsche Cayenne 2020
gone Corris Grey HSE Dynamic 2016
gone Ipanema HSE lux 2010
gone Rimini HSE 2005
!!

Thanks to you both for the feedback this spare issue is a pain in the arse the only reason i bought a 19 inch was because a 20 would not fit under the car so i have got the biggest size under there that i can, and when you say the car wont like it well for a short slow distance will that matter ?