Wheel spacers

Yes. That’s too high.

I recommend to start by getting a 15 mm spacer and seeing how it works for you in the rear. Please realize that 15mm is essentially the upper limit of what is safe/feasible fit in the rear without potential fender rubbing (depending on the overall condition of your suspension and your alignment).

You can run 15mm in the front without issue. Personally I think the optimal set up would be 15mm in the front and 10 vs 11mm in the rear, but I really really don’t like when wheels stick out “hot wheels” style beyond the fender.

I ran 11mm spacers in the front to clear my brakes. Photo:

 

22mm is the same as 10.5in ET60 rear wheels. it would look something like this with a little bit more ballooning of the tire, depending on the manufacture. That amount may be OK for you, but it was not for me. It would be close, but you can probably get away with it if you’re suspension and rear alignment/camper is on point.
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Won't spacers affect the scrub radius? Bump steer?

 

The short answer is, yes slightly in the front. Unless you are running extremely aggressive tires though, is unlikely you will notice the difference. The understeer that will be added from the rear spacers, however, will be much more dramatic/pronounced. Whether or not one may notice on a gingerly driven weekend car on ‘normal’ tires is open to debate. For some, they understood makes the car feel far more planted and secure. I don’t agree with that though…