Backspacing for the spare tire's wheel??

[brian2sun]

I'm wondring if anyone knows off hand what the backspacing is on the wheel that the spare tire is mounted on. I don't particularly feel like removing it and measuring so I thought maybe someone on here already knows and could save me some time. I'm trying to decide if I want to buy another wheel for my spare 255/85R16 or not.

 

[JohnsD90]

It is rather irrelevant, so hear me out, as long as it is factory it will fit, now you will probably say "Well now when i get a flat and i throw the spare on the spare's backspacing is bigger/smaller than the 4 other wheels i am running", if that is the case, then just put the spare on the rear axle, because its no big deal to run it for the maybe 50 or 100 miles on the spare with different backspacing, it wont hurt/wear the truck or tires enough to make it worth spending the extra $100 to $200 on an extra rim.

 

[driffter33]

Mine had a 15" wheel for a spare wouldn't even work on the front. I just picked up a matching spare wheel the other day. my reasoning was for when I put the spare on the back bumper all 5 wheels will mach. And so I know that I wont ever have to worry about weather it will clear in the front or not. If I get a flat on the front I don't want to have to change the rear also. When its cold snowy, muddy, rainy, or in the rocks.

 

[brian2sun]

Sorry guys, I messed up my first post. I meant to say 305/70R16 - not 255/85R16 (for the size of my spare). For now, I may have to run a 305/70R16 on it for a while until I save up enough for a 5th 255/85. So now I'm wondering if the spare wheel would still work with a 12" wide tire on it and not rub the UCA. I have 1" wheel spacers in the front already so as long as it has no more than 5" BS I'll be good (which I'm pretty sure it doesn't).

On a side note, I think the the spare rims look kinda cool. I'm almost thinking of getting some more out of the junkyard for cheap, painting them black, and running these rims on my winter tires - Another reason I'd like to know the BS'ing. I could always crank my spare down, it's just a pain to do with my 1" BL.