wheels - offset / backspeace ? - Diesel Forum

revdog · 08-02-2009, 04:45 PM

time for new tires. and figured id like to go to a wider wheel like a 9 or 10. the whole off set thing is confusing to me. backspace is another question. can someone explain this to me so i get the correct wheels. i currantly run 325/60/20s on a stock 06 250. tires look a little big for the truck so im either going to do a icon leveling kit or a 4.5 lift. have not made up my mind on wheel diameter as of yet. 17 -18 -20. i know the tire diameter will be 35's. realy like 37 but regearing is expensive, and the truck is pushing it now with 35's. any insite or recommendation would be a big help- also pics of similar set ups. thanx in advance. also whats the offset and back space of a stock 20?

**caryt** · 08-03-2009, 01:35 PM

Stock I belive is 6" offset doesn't matter only back space.

**Discount Tire** · 08-04-2009, 05:02 PM

Offset is where the backside of the mounting pad is located on the wheel from center.

For Example:

If you have a -12mm offset on a 9" wide wheel, the mounting pad would be 12mm towards the back of the wheel from the center. If you have a +12mm offset on a 9" wide wheel, the mounting pad will be 12mm forward from center. Back spacing is the measurement from the back of the mounting pad to the back side of the wheel. Click the link below for additional information

Wheel Offsets