I have a 2009 Jaguar XF Supercharged that had 20" Jaguar Wheels on it when I bought the car used. The low profile tires are causing the wheels to crack, and I am done playing that game. I want to put 18" wheels on the car, with higher profile tires. Will 18" wheels fit on this car?

 

No, will not fit over the brake rotors and calipers. You might get lucky and find a 19" wheel that will fit, but that is doubtful.

 

What size front brakes do you have? I thought the 2009 SC had the mid sized front brakes (355mm) and could take a 19inch wheel but the 2010 SC and XFR have the 380mm huge front brakes and cannot. So check that first
If the 380mm then you're stuck with 20inch except for a couple of 19incj wheels that might fit. If the 355mm then think plenty of 19inch will fit - but not sure about 18s

 

All OEM Jag 18" wheels that I know of fit over the 355 mm front brake calipers and all F-Type 19" wheels fit over the 380 mm front brake calipers, but of course even used F-Type wheels will cost a bomb.

 

Making changes to these cars is hard enough so stick to used OEM wheels.

Once you confirm your brakes are 355mm, all 19"s will fit. Still try before you buy, for example the rears off the F-Type will stick out too far.

For 18"s it is trial and error, but most will fit with a finger width of clearance to spare. I run the XJ Dynamic wheels for the past year, which I highly recommend. These were on the standard XJ for 5 years, cheap and easy to find. They still look good for the size, they are more narrow, cheap tire options, better ride, way more quiet, and no more bent/curbed 20"s. Hope this helps.

https://www.hubcaphaven.com/p/10590/...-c2c17295.html

 

I don't have to worry about this with my 19" wheels and nicer roads around where I live, but if I did, I would probably try run flats since they have such hard sidewalls. It wouldn't be a softer ride, but would probably save some wheels.