What Offset Do I Need?

I am getting a 18x10 amd 20x10 combo from bonspeed. I need to know what offset/backspacing I need to tuck them.

What Ford Truck is it going on F150,F250,F350,Ranger,Etc...

Damn! i'm lossing it guys. I have a 97 ranger. Thanks for pointing that out.

Well if you are ordering Bonspeeds order an 18x8 and 20x10 and it all depends on what you are doing to the truck. What size tires you are going to run.

20x10 are going to be tough to fit in the rear. I will look into it for you today.

After careful consideration. I have decide to go with 18x8 up front and 20x8.5 in the rear. Just in case you were wondering I decided to go with the Bonspeed Clutch. I do however still need to know the backspacing/offset so that I can tuck them on a bagged 97 ranger.

to tuck 5.5 w/ b/d 6.