We have fitted 255/40(but normally a 275/35/20 the VW recommend size)-normally on t30 or lower in 101 rating- but very little selection available in this T32 rating . The 265 works very well on this size wheel and zero rubbing unless you are going solow low heights.
‘Apparently’ the normal then is you have to fit under-rated tyres on a van and immediately invalidate your insurance and there is a huge safety issue. There are many people (and shops) who do this- it’s not for us
I would say a mid compound. We often get well over 15 k out of them, as long as the vehicle is correctly aligned (hunter). We sell in excess of 40 GY tyres a month - they are our No1 tyre.