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I have the 16 hole 16x7 OEM tundra steel wheels. I believe the BS is 4.5". Im looking at ipicking up a set of BFG 255/85R16 KM2's on my 03 Tacoma. I put on the steel wheel that comes with my spare and it looks like a bigger tire, (255/85 BFG) for example will end up rubbing my LightRacing UCA's. Do I need to get wheel spacers or just a wider rim with more BS such as the 17x7.5 FJ cruiser steelies? Any input is appreciated.

03 Tacoma on 2.5-3 inch OME front, Rear AAL with billies.
 

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4.5" BS quite a bit. Typically 3.75 BS is ideal. Keep in mind the tire can also rub the fender at full compression if the spacing is too much.
I just did the research and purchased my setup. I have 3.75 BS wheels with around 0.75" wheel spacers and fiberglass fenders. I don't have any rubbing with wrangler Kevlar 32s. I could take the spacers off and probably still be fine.
 

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I have the 16 hole 16x7 OEM tundra steel wheels. I believe the BS is 4.5". Im looking at ipicking up a set of BFG 255/85R16 KM2's on my 03 Tacoma. I put on the steel wheel that comes with my spare and it looks like a bigger tire, (255/85 BFG) for example will end up rubbing my LightRacing UCA's. Do I need to get wheel spacers or just a wider rim with more BS such as the 17x7.5 FJ cruiser steelies? Any input is appreciated.

03 Tacoma on 2.5-3 inch OME front, Rear AAL with billies.
I'm not really understanding your inquiry here :confused:

Many folk run a 255 on the factory wheel width/BS'ing with little complaint.
A 255 is narrower then the factory installed 265
^ not by much mind you... but it's measurable.

I don't know squat about the LR UCA design.

But my buddy runs 255's on stk wheels and factory UCA's
on his '02 Dcab.
Rubs the frame slightly at full L/R steering lock...
but nothing with the UCA.
The height of the 255's will rub elsewhere tho' ;)

If the wheel doesn't look the same size...
you better measure or look for a stamping on the inner side of the wheel.
Maybe be it is narrower !?
A narrower wheel will suck the side walls of the tire more inboard...
and the outcome of that... will be a taller cross section of the tire.
Thus making the tire taller then the others mounted to a wider wheel.

^ many spare steel wheels are often narrower then the primary four installed.
Cheaper cost I'd guess... not real critical for occasional use.
Not great for everyday use tho'


more understanding of wheels, BS'ing and off set...

https://www.rsracing.com/tech-wheel.html
 
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