Wheels produce a fair amount of drag. My guess (and it's just that, a guess) is that the 22" inch wheels had far too much opening for air movement, and so drag. That doesn't go along with Volvos push to be greener. It could also be they had such a low take rate that they simplified the build sheet. Or it could be a supply issue. I am pretty sure the 22"s are port installed, so perhaps they just didn't order more. Or it could be as simple as Volvos website is often full of inconsistency and errors. I just got a memo today on some week 48 changes and didn't see that listed, but that would be for US market. But I also haven't looked close as the order guide for the new recharges the US is getting for the halfway point. I suppose at then end of the day, if it's true, then there is nothing you can do about it, and if it's not true, then you're all set.