22x8.5 offset?

What offset do I need to tuck 22x8.5" wheels? Offset, not backspacing.

what kinda truck do you have?

05 silverado reg cab short box

this is a shot in the dark, but I'm gonna say +20mm on an 8.5" wide wheel

i have 22x8.5 on my truck and i run 6.5"bs and it tucks perfectly. i hope that helps, i can't remeber how to convert bs to offset. if it helps there is 25.4mm to every inch.