Tyre plaque / FAQ and hand book - please explain

[Ozzy119]

OK...so I'm bit confused about this now......

I have been reading quite a bit on changing tyres. Plenty of people out there with various setups and opinions.

Please explain: my tyre plaque inside my drivers door shows various wheel options. I have 255/60/R18 and the plaque says load rating 112. But the FAQ here says handbook suggests 110 and that the plaque allows 109. The only way I can see 109 allowed, as per the plaque, is if you had R20's on.

So i'm puzzled as the A/T tyres I'm favouring have a 110 rating on 18" rims.

Surely that isn't allowed, based in what the plaque is saying?

[101RRS]

The section on the plaque that lists different wheel and tyres sizes has heading that indicates these are Recommended sizes and load ratings.

Under that it gives the lowest ratings you are allowed can go to - on my RRS it is 980kg or 106. Your D3/D4 will have slightly higher ratings.

I would exceed the ratings listed in the recommended section to be on the safe side.

Garry

[gghaggis]

if you think about it, the total weight load on the tyre should be independent of the rim size, so the minimum stated load should suffice.

The recommended figures depend on what's available at time of stamping. And there are many tyre sizes it doesn't cover, hence the minimum.

Cheers,

Gordon

[MadJax]

I am the same boat. Tyre fitters are not happy to supply 110 on 18inch wheels as the plaque states

235/70 R17 111H
255/60 R18 112V
255/55 R19 111V
255/50 R20 109Y

However the manual states that winter tyres can have a different rating
235/65 R18 110H
255/55 R19 111H
255/50 R29 109H
So could I make an assumption that ATR tyres are like winter tyres and the 110 load rating makes it all OK.
I'm looking at Mickey Thompson 285/60R18 which have the 110 load rating.

[gghaggis]

Each state varies a little, but under NCOP v14 S11, it states:


"A motor vehicle under 4.5 tonnes GVM which is required to comply with ADR 24 may be equipped with tyres other than those listed on the tyre placard provided that:

the load rating of the tyres is not less than the lowest load rating listed on the tyre placard of the vehicle or equivalent variant of that model vehicle;

the speed rating of the tyres fitted to a passenger vehicle is at least 180 km/h (S) when the tyre placard requires a higher speed rating than S;

the speed rating of the tyres fitted to vehicles with special features for off-road use of at least 140 km/h N when the tyre placard requires a higher speed rating than N; "

Most states have committed to the NCOP regs, not all have yet ratified them, but should soon. The above obviously applies if you are fitting a tyre size NOT listed on the placard eg 265/60R18. It gets a little greyer if you're talking about a listed size. Show this to your tyre fitter.

Cheers,

Gordon

[MadJax]

I had a call from Cooper Tyres today. I asked about thier web site showing that the D3 & D4 can both fit the 265/60R18 110 tyres. He stated that you have to meet or exceed the minimum load rating or any rim size, which matches what gghagis said.

Now I need to track down a good price for a set of 4 (the spare can stay as it is)

[~Rich~]

I had a call from Cooper Tyres today. I asked about thier web site showing that the D3 & D4 can both fit the 265/60R18 110 tyres. He stated that you have to meet or exceed the minimum load rating or any rim size, which matches what gghagis said.

Now I need to track down a good price for a set of 4 (the spare can stay as it is)

Remember the spare must be the same overall size!
Damage may be done if this is not adhered to.

[MadJax]

Rich,

I had not thought of that. Still for now I am just going to replace the 4 worn ones. Not had to replace a tyre for 10 years.

Bugger I'm going to get one now!

[Dingmark Jim]

My D4's handbook has one page which looks to be out of the RRS handbook (ie, it talks about 255x50R19 tyres), so the placard should trump the book.

[dukemasterpro]

Had this happen to me when about to order at3 in 18 inch for a D4. The guy at bob jane said he could not officially recommend a tyre with a load rating of 110 when 112 was required. I can see that 109 is allowed with a 20" rim on the d4 - is the At3 going to be legal?? There does not seem to be any other at options in this side apart from the Pirelli atr ( which does not get a good rap and is more $$$)