Just looking for some answers..
I ordered my first Volvo last week.. I went with the 2018 XC-60 T6 R-Design with Polestar. I decided to order the 22" wheels.. In the catalog and online it says that those wheels must be used with Fender Extensions, so I'm guessing that its a complete package. Can anyone confirm this? On the build it page, it says nothing about fender extensions. I really want these as it make the car look so aggressive...

Complete wheel, 22" 5-Double Spoke Matt Black Diamond Cut Alloy Wheel - C008 - XC60 2018 T6 AWD Automatic - Volvo Cars Accessories

 

According to Volvo's website, the fenders are required for the wheels. I'm assuming it's because they're wider and have a more aggressive offset, so this will keep you from having the wheels/tires poke out from the OEM fenders.
Complete wheel, 22" 5-Double Spoke Matt Black Diamond Cut Alloy Wheel - C008 - XC60 2018 - Volvo Cars Accessories

And if you look at pics from a dealer's site that have XC60's on the lot with the upgraded 22" wheels, you'll see that they all have the fender flares/extensions.