Correct tyre pressures

[mentaliss]

Ok, so were off to Venice tomorrow but does any Techie here know the calculate the correct tyre pressures for 215/45/R17 87V, (me and the wife, TowBox with whats inside of it 45kg)

[haydn callow]

I personally would go for 38 front and 40 rear

[rita]

I personally would go for 38 front and 40 rear

Hi haydn,do you think the load index will be ok for this vehicle (215/45/R17 87V)

Cheers..

[haydn callow]

I would do as I suggest and see how it sits/rides....perhaps a couple of Lbs more would do no harm

[missfixit70]

The load rating of 87 is waaay too low, see the factsheet on tyres or this thread -

Eek! my tyres are rated 93V all round. Although from what I can gather googling this covers a max load of 2600kg which should be 20-25% above vehicle weight. I don't have a camper conversion or a van full of people so hopefully I'm ok
Also just got the van back from garage with autobox serviced and oil pan straightened out. Was £240 a good price anyone?
Cheers,
Martin

Ok, I'm not trying to scaremonger here, but that doesn't leave you much margin for loading the bongo (are you really going to drive around with it empty? - it's very easy to overload a vehicle of that size without realising it) & you're under the recomended tyre ratings in the handbook & on the drivers door plate





As you can see it says that 92S is ok for the front for a 195/70R15, but as soon as you move up to 195/80R15 the recommended rating is 96S.
For the rear you can see that the rating increases to 98S from 96S when you go from a 215/65 to a 215/70.
Personally, as you (& many of us) are fitting non standard wheel sizes, I would prefer to take the maximum value there & make sure all the tyres are above that, rather than the minimum, especially when fitting same size tyres all round.
Also worth checking the age of the tyres, anything above 7 years isn't good.
I would suspect (as has been discussed on here MANY times) that using tyres that could be considered underrated could invalidate your insurance in the event of an accident.
Your tyres are the only thing sticking you to the road, is it worth the risk?
I am no tyre expert, I just like to have a bit of belt & braces safety margin, especially on mine where I often tow a trailer or have a box & bakrak/bike & bikerack.
The tyre pressures on these specs will be a bit low for uk spec modern tyres, apparantly Jap spec tyres were a softer compound.