looking for info on 22's

Hey all, im looking for some info on 22's... like backspacing and offset. All the things i need to consider for the project. I know they will fit, just dont know what specs im looking for on the rims. I have a 2wd 1997 Ford Explorer Sport..any info or help would be greatful.. i dont know if any1 has already posted this thread yet.
Thanks David