Is -12 offset same as 4.5" backspacing

A guy build on here haves a 08 Tacoma with a Rcd lift he haves the monsters on it. With a20"-10" rims. Now rcd say u can fit a wheel with 4.5" I can't find the monsters in a 4.5" backspace .. So dose anybody know how or if you can help me please .. Or is -12 offset the same thing ???

 

-12 offset is close to 4 inches of backspacing.

 

Ok so let me ask you this is 5.01 backspacing just basically a 1/2" more then 4.5" backspacing ?? The lift calls for 4.5" so will 5" work to just stick out 1/2" more ???

 

half inch less

 

What the fuck then. Hbtacoma got them on his truck some how then.

 

Without knowing the width of the wheel you can not relate offset and backspacing. Trifenix is right on if the wheel is 8" wide.

Found this calculator that works well: http://www.autolounge.net/calculators/tirespacing.html

 

x1000.

-12mm offset is 4.5" BS for a 9" wide wheel ONLY.

 

Ok understand that but one his build it says 20"-10" monster xds ... And I can't them wheels with a 4.5" backspacing less he's not telling the truth about the wheel size I do know it's a 20" rim. Reason I'm doing all this is cuz I have the rcd lift and rcd them selves said to me don't matter what wheel size I get just long as I have 4.5" backspacing ... Reason I'm going off HBtacoma cuz I like the stands of it.

 

If you want a 10" wide rim with 4.5" backspacing, that would be -25 mm offset.

A 10" wide rim is pretty wide....what size tires are you planning on running?

 

33/12.5/20 .. But I thought I need a 4.5" backspacing. Closes thing I can find on a monster is 5.00" ???

 

The 18's have a 4.5" backspacing option. That's all I see on their site.

 

Yeah I don't know ... But HBtacoma have them on his truck .. With a rcd lift. I'm just getting pissy I have this lift laying in my house and i cant find a wheel that will look good with that lift so money wheels choos from and i dont want make wrong choice like monsters thats why I'm stuck on them. But I don't know what offset or backspacing I can use to make them fit with that lift !!!!!!!! WHF !!!

 

If you are really set on the 20's, you could use a small wheel spacer to push them out further if they rub.

 

I just put a post on the Kmc ... Check it out ... Thanks for working with me KPT