Hi does anyone own a Lada Nivia?

If the tyre size is 235/75/15 then follow the instructions of original manual.
Compact off road friendly vehicles like Lada Niva , Nissan Terrano2 etc are often misunderstood by mechanical newbies for so called SUV that is why they do so. I had this problem those few times I went to garages to change wheels.

Thanks for the reply, how do I check the size of the tyres? My husband always did everything to do with the car and I’m completely lost now, only that he must have been putting more than the brochure says because when I first checked them they were around 2.6.

Maybe he had done it right, since Lada Niva is little bit special kind of a cult vehicle that you can have different kind of tire sizes than the original size or the size I mentioned, tire pressure in the manual works for those both sizes but not way more than that, then you destroy the tire. You can check what size you have on it on the side of the tire, very hard not to see it