Can someone please tell me the backside measurement (outer edge of the inner rim to the mounting surface) of the optional OEM 20"x9" 1500 wheel?

Thanks in advance.

 

I believe the term is back-spacing. I don't know what it is for a 20" but I can measure it on a 17" if you want.

 

Thanks for the offer, Osteodoc08, but I'm interested in the 20s. I need the factory wheel measurement to compare with aftermarkets. I appreciate it.

All the best.

 

I don't know what it is, but let me know if you find anything out. I tried looking on the internet but i could not come up with anything definant. I'm lifting my truck and I hope that the stock wheels will work, as I can't really afford new rims right now. I hope that they don't rub.

 

Call the dealership they can look it up in there computer.

 

BOLT PATTERN: 5 x 5.50
HUB CENTRIC: Yes
WHEEL HUB OFFSET: +19.05mm (Positive Offset)
BSM (Back Space Measurement): 6.00
HUB HOLE DIAMETER: 77.80mm / 3.063"

 

locked up: how did you calculate the Wheel Hub Offset?

 

Actually, I pulled that from a spec sheet I found, without really looking at it.... but now that I look at it it doesn't make sense.

The 19.05mm positive offset should equate to the BS being .75" off the centerline of the wheel.... so I believe the BS is 5.25".... unless there is something I am missing.

You best bet, other than having someone remove one for ya, may be to ask a seller on ebay

If you can't find anyone to give you a solid answer.... I'll be removing my 20's within a week or so and will gladly let you know what I find.

 

Thanks. Let me know what you find when you remove yours. I've seen a few places that the BS is 6". That would make the offset 1.5" or 38.10mm.

 

Thanks for the further info... been out of town for a while.

"Offset" is measured from the wheel centerline. Positive is toward the outside and negative to the inside of the centerline (as I recall).

I show the wheels to be 9" width, which would be 10" outer rim to inner rim edges (always an inch wider than "wheel width"). Hence, when figuring offset one would start from 5 inches, NOT 4.5 inches. Given that one could figure backside or the more current term, "back-spacing" if we knew for sure what the offset is--19mm or 38mm.

But, If backside is given as 6 inches (and the stated wheel width is 9 inches), the offset is 1 inch or just under 26mm.

All the best.