Probably not specific to Focus but I had the TPMS's changed on my Focus the other day, all good, 'relearned' via 'tool' etc.

i've not, luckily, needed to remove a wheel my self for quite a while, I was surprised at how difficult it was for them to remove wheels. I know might need bit of a smack or kick with foot but all wheels needed afew good hits with sledgehammer from reverse of tyre, always hitting the tyre rather than wheel. Wheels are standard alloys, been removed now&then for new tyres etc.

is it normal for such force to be needed, I start to feel that if needed I wouldnt be able to manage changing a tyre unless carry sledgehammer in boot.

Peter

Alloys do seize onto the hubs due to the reaction between different metals. You can prevent it be applying a smear of grease just on the contact patch.

Can't say I agree with hitting a tyre with a sledgehammer though. Tyres have steel braiding inside that could be damaged by that. If you get a bulge on any of the inner tyre walls in the near future, at least you'll know why!

If it's at the roadside, kicking the top of the tyre with the sole of your boot should work. At a garage the better option is to carefully lever the metal wheel rim away from the chassis/suspension using a pry bar in between.

It is extremely common for alloy wheels to become seized onto the hub. I always use ceramic grease and have not had that problem ever since.

I usually use a heavy rubber mallet to tap the wheels loose. If that does not work, I just loosen the wheelnuts 2 or 3 turns and drive the car for a few hundred metres (on a private property at limited speed). This usually does the trick.

@JW1982 is posh with ceramic grease (although it's probably the best)! Cheaper copper grease will also be fine. But use some, just a thin layer on the hub face is enough.

Copper grease adds yet another metal to react!

Not recommended on wheel hubs or brake calipers nowadays. Ceramic doesn't react with metals.

The area where the centre bore of the wheel contacts the front/rear hubs is often an area where wheels can stick - know of manufacturers who used to add grease in this area for this reason.