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reid7774

Member Since: 12 Apr 2012
Location: Thurso
Posts: 73

2007 Range Rover Sport TDV8 HSE Stornoway Grey

Tyres

A wee note, my last topic was locked so had a Question regarding a comment about my tyres on RRS from PADDI I think, the tyres on it are sagitator 275/45/r20, now the comment mentioned was to make sure they were at least 275/40.....and rated for the RRS, how do I no what they are rated for and why make sure they were 275/40 and not 45...... 2007 V8 HSE RRS STORNAWAY GREY

Tue May 28 2013 9:08pm

Beancounter_74

Member Since: 11 Oct 2011
Location: Down here now...
Posts: 5796

As a starter for 10, I'd check the sticker on the inside of he door or the handbook and see what it states and make sure the tyres comply to the sizes there ON THE WAY: BMW F21 M140i
MERCEDES GL350 - Metallic Navy Blue w/Grey interior

GOING: BMW F31 335D MSport+ xDrive Touring
GONE: Land Rover Discovery 4 HSE - Stornaway Grey w/Black Interior (wish we'd kept it )
GONE: BMW F10 520D MSport - Carbon Black
GONE:MY12 RRS SDV6 HSE Sumatra/Ivory/Grand Black Privacy glass

Tue May 28 2013 9:17pm

codfather

Member Since: 13 Feb 2010
Location: ayr
Posts: 1171

2010 Range Rover Sport 3.0 TDV6 SE Santorini Black

You want them marked XL, as they are the same size as BMW saloonsetc, and the RRS weighs twice as much. If you get 45 profiles your speedo would read wrong, and you would get a higher top speed but acceleration would be lower basically !
Hope this helps
Dave MY10 TDV6 SE (debadged ), Santorini Black, Flappy paddles, Privacy Glass, 20" Stormers, Mudflaps!

Gone: a comprehensive list of imprezas and a Merc ML AMG

Tue May 28 2013 9:17pm

simple1

Member Since: 15 Jan 2006
Location: Somerset
Posts: 1657

2007 Range Rover Sport TDV8 HSE Cairns Blue

Should read a minimum of 106y as load rating. It will be printed on side of Tyres after the size marking. So should read 275/40/20 106Y XL or Extra load. Anything less than 106 will not be adequate for a Sport.
Sorry your thread got hijacked, really isn't the norm here 2x TDV6. SE and HSE. Both returned to sender with issues👀
TDV8 Sport HSE...... Gone. Loved it but it didn't love me!!
Now rolling in MY10 Fullfat TDV8 Vogue. Slammed it to go round corners🙈
Cruising daily #56 mph in a Volvo V8. 😱
Lots of other toys in the cupboard...😜

Tue May 28 2013 10:06pm

RRSTDV8

Member Since: 12 Aug 2011
Location: Northamptonshire
Posts: 8988

2012 Range Rover Sport SDV6 HSE Orkney Grey

Looking at the scarce info on the web about this tyre maker, they make 275/45/R20 106H and 275/45/R20 110V XL

The former tyre has the correct load rating (106 = 950kg) but isn't marked as XL (Extra Load). The XL thing is related to loads and tyre pressures. Basically, in order to carry the load the XL tyre uses a higher pressure (and so needs to be stronger). As we need to run our rear tyres at over 40psi when running fully loaded, I guess that's why we're looking at XL tyres.

You can see in these tables (From Uniroyal via Pistonheads) that for a tyre with a load rating of 100, the XL tyre needs to be inflated to 2.9bar, where the standard tyre needs only 2.5bar.

Click image to enlarge

I have to say that the XL issue is rather confusing and seems to be a tad counter intuitive - that the XL tyre carries less load at a given pressure compared to a standard load tyre. There must be something more to it than that and I'll see if I can find out anymore.[/url] 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Tue May 28 2013 11:44pm

RRSTDV8

Member Since: 12 Aug 2011
Location: Northamptonshire
Posts: 8988

simple1 wrote:
Should read a minimum of 106y as load rating.

Strictly, that is the speed and load rating in one: 106 is the load rating (950kg) and Y is the speed rating (186mph).

2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Tue May 28 2013 11:48pm

simple1

Member Since: 15 Jan 2006
Location: Somerset
Posts: 1657

Strictly, that is the speed and load rating in one: 106 is the load rating (950kg) and Y is the speed rating (186mph). [/quote]

Is that why they limited top speed to 140? From what's available to read, LR felt that the tyres were marginal at over this... 2x TDV6. SE and HSE. Both returned to sender with issues👀
TDV8 Sport HSE...... Gone. Loved it but it didn't love me!!
Now rolling in MY10 Fullfat TDV8 Vogue. Slammed it to go round corners🙈
Cruising daily #56 mph in a Volvo V8. 😱
Lots of other toys in the cupboard...😜

Wed May 29 2013 8:21am

Ady 555
Site Moderator

Member Since: 12 Dec 2010
Location: Good old yorkshire
Posts: 8738

2012 Range Rover Sport SDV6 HSE Santorini Black

Re: Tyres

reid7774 wrote:
A wee note, my last topic was locked so had a Question regarding a comment about my tyres on RRS

Might help if you post in the right section in the first place

But i'm sure that isn't the reason it got locked.

http://www.rrsport.co.uk/forum/wheels-tyres-vf32.html

Wed May 29 2013 8:52am

reid7774

Member Since: 12 Apr 2012
Location: Thurso
Posts: 73

So the tyre on at Moment is 110v so tyre is suited for rrs, only thing wrong is the wall size,Its 45 and Not 40, and fact Its a poor tyre, corrrct or Not. Haha Yeh dont think thats why it was locked but will watch were i Post. 2007 V8 HSE RRS STORNAWAY GREY

Wed May 29 2013 10:06am

RRSTDV8

Member Since: 12 Aug 2011
Location: Northamptonshire
Posts: 8988

simple1 wrote:
Quote:
Strictly, that is the speed and load rating in one: 106 is the load rating (950kg) and Y is the speed rating (186mph).

Is that why they limited top speed to 140? From what's available to read, LR felt that the tyres were marginal at over this...

"Y" is the speed rating, "106" is the load rating. No need to whistle.

As it happens, the speed rating is actually the maximum speed at which the tyre will run whilst its carrying maximum load. By specifying a higher speed rating you effectively add a factor of safety. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Wed May 29 2013 10:46am

RRSTDV8

Member Since: 12 Aug 2011
Location: Northamptonshire
Posts: 8988

reid7774 wrote:
So the tyre on at Moment is 110v so tyre is suited for rrs, only thing wrong is the wall size,Its 45 and Not 40, and fact Its a poor tyre, corrrct or Not. Haha Yeh dont think thats why it was locked but will watch were i Post.

If it's marked as 110V then it would seem to be ok. Does it have "XL" or "reinforced" on it too?

The aspect ratio is taller than specified by LR but that's only a problem if you need to make a warranty claim - they might use it as an excuse to void a warranty claim relating to suspension. Other than that, it changes the gearing slightly. Some people run a taller ratio on 20s in order to improve the ride quality but also because they are cheaper than the correct tyres. I run 55 instead of 50 on my 19s but that's only because Pirelli don't make the ATR in 50 ratio. I never fit cheap tyres - a false economy in my opinion.

I shouldn't worry about posting in the wrong section - most new posters seem to these days and anyway, threads often seem to degenerate in to wibble... 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Wed May 29 2013 10:57am

mse

Member Since: 08 Mar 2011
Location: Warwickshire
Posts: 2916

simple1 wrote:

Is that why they limited top speed to 140? From what's available to read, LR felt that the tyres were marginal at over this...

Yes - LR did limit the speed due to tyre safety - basically to give you safe operation, rather than the tyres being unsafe Mike

2014 Facelift Discovery

Wed May 29 2013 5:24pm

simple1

Member Since: 15 Jan 2006
Location: Somerset
Posts: 1657

Do like this forum. Learn something useful virtually every day
My whistle was because the tyre rating is 186 yet LR applied speed limit of 140. That's some margin 2x TDV6. SE and HSE. Both returned to sender with issues👀
TDV8 Sport HSE...... Gone. Loved it but it didn't love me!!
Now rolling in MY10 Fullfat TDV8 Vogue. Slammed it to go round corners🙈
Cruising daily #56 mph in a Volvo V8. 😱
Lots of other toys in the cupboard...😜

Wed May 29 2013 5:43pm

reid7774

Member Since: 12 Apr 2012
Location: Thurso
Posts: 73

Yeh they have reinforced on them, not too happy about wrong aspect ratio, will be contacting garage I bought from to see what they saying about it.... 2007 V8 HSE RRS STORNAWAY GREY

Wed May 29 2013 8:19pm

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