Factory 18 inch wheel specs and spacers questions

[Sandbox]

ON the HD 18" wheels, anyone know the specs on the factory 18" wheels? (Backspace, offset, width). I believe they are 18x9s but, not positive.

Also, anyone run a spacer with their factory rims when going with larger tires. Thanks!

 

[MADDOG]

18" 6.4L HEMI wheels:

18 x 8, 43mm positive offset, 8 x 165.1 bolt circle. Some of the 20" wheels are 9" wide. The size should be stamped on the backside of the wheels.

I haven't used spacers on an HD but I've seen some folks that do when they want to run a wider tire.

I replaced my black OEM wheels with an 18x9, 18mm positive offset, aftermarket wheel so I could add 35's. That offset moved my wheel about an inch further towards the outside plus about 1/2 inch to account for the 1" wider wheel.

 

[Sandbox]

Thanks MD. My plan is to get some aftermarket 18x9s with about an 18+ offset. Depending on when it needs to happen (due to tire wear), I'm just looking for ways to mitigate the cost. However, if the 18x9s are only 8" wide, then I ma need o go ahead and upgrade wheels regardless.