Zitat

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Just had my 2015 320 GT serviced at AL, was looking at paperwork they are 2014 so old.
Just been to storage tyres are
185/70 R 13 86 T

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Hi Pat. They are the same size tyres that were originally supplied when our 1999 Troll was new and up until recently I've managed to replace them with the same size tyre.

However, for many years I have been worried that the 86 marking on the tyre gives me a maximum tyre load rating of 530 kgs per tyre yet our Troll has a maximum load rating of 1000kg.

Using the tyre maunfacturer's ratings, it is considered that your tyres should be 10% above the maximum load of the van, therefore they should be good for 550 kgs.

https://www.blackcircles.com/helpcentre/...-is-load-rating

I finally decided to go for a higher rating when the tyre size we are talking of became difficult to find. More on that below. Therefore our most recent tyres are small van tyres 185/70 R13 but have a load rating well in excess of 550 kgs. So much so that I worried that the tyres would have side walls that were too "stiff" to help with the rudimentary suspension on the Eriba. However, having used them for over 12 months and 1000s of miles I am now quite relaxed with the fact that I changed up. The air pressure recommended for our Troll is 3 bar so I do not exceed that as I don't wish for the tyres to be rock hard.

The main problem with locating the original tyre size, 185/70 R13 86T is more to do with the tyre's max pressure rating. This rating is often only found on the rear of the tyre and for that size of tyre the ratings can be as low as 2.5bar (36psi) and as high as 3.5bar (50psi) and it's the higher rating that is difficult to find and we didn't want to be running tyres that were over the max inflation recommendation.

I'm talking about 13 years ago now but when AL sold us the used Troll onto which they fitted new tyres, the max air pressure was only 2.5bar and I only found this out during the course of time so I had been running them seriously over inflated for a few years. I did manage to find higher rated air presure tyres in subsequent years but with a degree of difficulty but never did find a tyre that suited the 550 load rating, hence my decision to go up to a light van tyre..

Randa

This thread (or something very similar) has found it's way onto our Eribafolk Facebook group page and I'm a little concerned that many of the contributors on there are saying "use commercial tyres or lightweight van tyres" and not car tyres as the ultimate panacea. I just want to refer back to the many discussions we've had on this forum over the issue of tyres.

Whilst I have had to make the decision lately to go for what is called a lightweight van tyre because I can no longer get a tyre that fits within all the various rating requirements for an "Eriba Tyre" that'll suit my Eriba, I am concerned that folk don't get carried away by thinking that fitting an overrated tyre is the complete answer.
I still have the original tyre dated 1998 that was supplied by Hymer/Eriba when my Eriba was brand new.
It's a Dunlop SP CAR tyre with the following size and ratings:-
185/70 R13 86T The 86T gives me a load rating (86) of 530kg per wheel. The speed rating (T) allows me to do 118 mph 😊 . The load rating on the tyres supplied with my 1000 kg Eriba only gives me a 6% safety margin whereas it's normally recommended that caravan owners purchase tyres with a load rating of plus 10%. (think I'm OK with the speed)
The tyre presure reading on the Dunlop SP is 44 psi. Recently Hymer has recommended I carry 42 psi in my tyres.
So at new, my Eriba almost (but didn't ) conform to safety recommendations by using a good quality car tyre.
HOWEVER, when I purchased the Eriba second hand from out friends at Automotive Leisure, they changed two of the tyres and fitted "Runway Tyres" that only had a tyre pressure reading of max 36psi. That's where the problems could start in my opinion. An over inflated car tyre can spell trouble.
My conclusion is that although I am now forced to use lightweight van tyres the load rating is far in excess of what is required so please beware of the possible damage to suspension an overrated tyre may cause. See below:-
https://www.caravanclub.co.uk/media/1022...azAOjQ9koznabcg

Yes, a 102 load rating equates to 850kgs. That means it's suitable for a caravan weighing in at around 1500 kgs laden, taking into account the 10% safety factor.

Probably not so bad on a 1400 kg Eriba but not so for 1000 kg one.

In saying that and I think, because I'm aware of these problems so keep my tyre pressures down to around 40-42 psi, it would appear that I get a good drive from the Eriba. I would hate to find the devastation within the van if I really pumped the tyres up. It'd be like a bouncy castle.

It does still worry me though that some people don't take heed of the maximum tyre pressures that are marked on some (car) tyres.

Randa