I'm looking at getting some 22" rims for my 2001 Blazer Xtreme and I'm not sure what the proper Offset and backspacing I would need?

The rims im look at are 22x8.5" Offset 20 and Backspacing 5.54. Would these rims fit?

 

Is your blazer 2x or 4x...not familiar with extremes
2x backspacing is 4.5 inches
4x backspacing is 6 inches
so if your wheels are roughly 5.5inches...then they will stick inward the dif of 1 inch
i think you cannot go past 4.5 without major issues or some wheel adapters/spacers to push them back out.

Offset and backspacing is dif things....but you get the idea.

edit:

example
2x wheels on a 4x will stick out 1.5 inches further 6-4.5=1.5

 

Its a RWD. The rims say +20mm offset, 5.5" backspacing.