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Loadrating 109
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Mounty
 


Member Since: 08 Mar 2007
Location: Near Basel
Posts: 762

Switzerland 
Loadrating 109

Can I run a tyre with a loadrating of 109 on the D3?



Mounty
 Daniel

Now: RSS 2008 3,6l HSE
Past: 2.7l D3 HSE, D3 4.4l HSE, FFRR 2004 4,4l 
 
Post #27210413th Mar 2008 3:33 pm
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Member Since: 16 Sep 2007
Location: UK
Posts: 6019

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Unknown ColourDiscovery 4

Apparently it is legal, but you may have trouble with insurance as they are not recommended and also they tend to burst when used off road.

If they are 19" RRS wheels, then the alloy is also underated.

I sold my set as it wasn't worth the hassle it could cause.
  
Post #27210613th Mar 2008 3:36 pm
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SPOTTER
 


Member Since: 06 Dec 2006
Location: Adrift........
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United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Not recommended..............It is an easy out of spec to be poulled up on if tyres were a contributory factor in an incident.

what is this about the wheel being underrated also?

Mine is running on the RRS wheel on the understanding the wheel is fine, as are a number of others?
 end of an era ....... maybe a Defender when it appears.......  
Post #27210813th Mar 2008 3:40 pm
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al cope
 


Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10352

England 

OK


D3 alloys are rated @ 940kg, RRS at 900kg. I'm running RRS alloys.

For the UK, LR minimum tyre spec is 111, although I know that for Aus, its 110. I havnt seen anything lower than that though.

Alan
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Post #27212213th Mar 2008 3:56 pm
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Member Since: 16 Sep 2007
Location: UK
Posts: 6019

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Unknown ColourDiscovery 4

SPOTTER wrote:


what is this about the wheel being underrated also?

Mine is running on the RRS wheel on the understanding the wheel is fine, as are a number of others?


As Al said the RRS wheels are 900kg, not sure if it really affects it though, but tyre place selling MTR's said they were not correct spec and should only be used for off road.
  
Post #27216813th Mar 2008 5:55 pm
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SPOTTER
 


Member Since: 06 Dec 2006
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which tyre place is that?

My wheels were dealer supplied and fitted so...... Whistle
 end of an era ....... maybe a Defender when it appears.......  
Post #27217013th Mar 2008 5:57 pm
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Member Since: 16 Sep 2007
Location: UK
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SPOTTER wrote:
which tyre place is that?

My wheels were dealer supplied and fitted so...... Whistle


AJS, they specialise in off road wheels and tyres. My dealer said the RRS wheels were fine with the 109 rated tyres as well Shocked

In reality I don't think it will matter, but I didn't want to take a risk with non spec wheels for insurance.
  
Post #27217613th Mar 2008 6:01 pm
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MrH
 


Member Since: 08 Aug 2007
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IMHO It's off road the under spec wheels are likely to give way as it's more likely you'll be driving at such angles that will place 75% or more of the vehicle weight ontp 2 wheels. However, chances are that they'll only crack off road and then actually give out when your bombing down the motorway. Confused

I won't risk it since seeing photos of the possible results and being told some horror stories by a mate who's an insurance assessor. And for the eagle-eyed amongst you, yes I did have a set of non LR 18" wheels, but I no-longer have them since finding out the were rated below 900kg - thing is I really liked the look of them Evil or Very Mad

Do a search on wheel and tyres rating and you should find a very detailed thread on which RRS wheels are suitable for the D3 - it's a much covered subject
 LRs are a fond memory, apart from the maintenance.  
Post #27218113th Mar 2008 6:08 pm
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al cope
 


Member Since: 08 Nov 2005
Location: Oldbury, WM
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England 

Nutter

easy answer - No RRS alloys are weight rated at 940kg, only 900kk, same for all FFRR. I may seem a bit of a hypocrite as I've always said dont go lower than 111 rated tyres on the D3, even though I'm running RRS alloys on mine (both 19's and 20's), but have 255/55x19 111V's on the 19's and 295/45x20 114V's on the 20's. I'm inclined to think a tyre is the weaker part of the wheel/tyre setup.

If you do the maths, 111 rated tyres, fully loaded get you into tachograph territory. And if you do have a problem, the tyre details are much more visible than the alloy rating.

And, how many of us add/change bits on our cars - it would be a very sterile world if we left them standard. Thumbs Up

Al
 Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
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Post #27220013th Mar 2008 7:15 pm
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Desert Traveller
 


Member Since: 06 Aug 2006
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Australia 2006 Discovery 3 TDV6 SE Auto Chawton WhiteDiscovery 3

In Oz its 109. Not that I would fit anything with that low rating to a 3 tonne D3.
 06 TDV6 SE with many LR and after-market extras. Used only on weekends and trips out west.
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Post #27234213th Mar 2008 10:09 pm
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Ent
 


Member Since: 12 Oct 2007
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Iraq 2011 Discovery 4 3.0 SDV6 XS Auto Fuji WhiteDiscovery 4

I'm running Contis 275/50/R20 109W which IMHO are man enough for the job but thats not what counts its how your insurance see it. If you are involved in a crash that resulted from a blow out you could find yourself in poo street but if you where involved in a crash and tyres played no part in it i.e running a red light then whats the problem? I'm sure someone in the insurance industry will be along soon to set the record straight.

And before anyone points out that my rolling radius is incorrect I know this but do not lose any sleep over it.
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Post #27234613th Mar 2008 10:18 pm
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maddogsetc
 


Member Since: 27 Nov 2007
Location: Hampshire
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England 2006 Discovery 3 TDV6 HSE Auto Lugano TealDiscovery 3

Quote:
No RRS alloys are weight rated at 940kg, only 900kk, same for all FFRR


Is this correct? I thought FFRR wheels were okay on D3? Not that this is necessarily reassuring, my stealer didn't see a problem with using (current spec.) FFRR wheels on a D3.
  
Post #27414917th Mar 2008 7:52 pm
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ianv
 


Member Since: 20 Dec 2007
Location: Bungendore, New South Wales
Posts: 338

Australia 2015 Discovery 4 3.0 TDV6 Base 7 Seat Auto Fuji WhiteDiscovery 4

Std tyres on my S model were 111 rated, standard wheels 940KG, Locally you cannot run below those numbers without being classed unroadworthy and giving your insurance company an option to deny a claim. As it is a four wheel drive you are allowed to run any speed rating over 140km/h, ADR's apply, But it is best to stick with factory numbers as a minimum.
 TDV6  
Post #27439518th Mar 2008 9:17 am
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Rob Bruce
 


Member Since: 18 Jun 2006
Location: Canberra
Posts: 687

Australia 2005 Discovery 3 TDV6 SE Auto Maya GoldDiscovery 3

In Oz we do not have autobarns, so a 109 rated tyre has a speed rating in excess of eney of our speed limits.
Even the NT now has a max speed limit of 130 km/hr, but you do have to use some discression here.
High speed tyres have little tread depth and lightly constructed so they build up less heat, so can go faster also have lower load capacity.
Off road tyres because of their heavy construction run hotter with speed so the speed restrictions are on them. also have higher load rateings.
So some common sence comes into play

Rob
  
Post #27446918th Mar 2008 11:42 am
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caverD3
 


Member Since: 02 Jul 2006
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Australia 2012 Discovery 4 3.0 SDV6 SE Auto Fuji WhiteDiscovery 4

I think your insurance company would be on shakey ground trying to deny a claim with this attached to the vehicle:

Click image to enlarge
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Post #27451118th Mar 2008 12:36 pm
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