Bit of a pinch of salt with this info, which is incorrect in some areas, ETRTO actually states that in 9” for example, 40 and 35 profiles with 275 works, hence also being the VW recommended width in 35 profile for T30 and below on their 9” x 20” Supermetal Trident.
It’s a minefield out there and you have to be careful with data online