[fannitti]

so i have m/t classic II 17x9 with a 4.5 backspacing and -12 offset. procomp have black steel wheels i like 17x9 with a 4.25 backspacing and a -19 offset. will these stick out a lot more then the m/t that i have stupid question. if so how much? i cant find any charts online that will show me how this will look.

 

[!05RAM05!]

With out doing the exact math, the new wheels would stick out farther by about a 1/4" or so.

 

[fannitti]

really the back spacing is only 1/4 inch less but the off set it a lot -19 from -12

 

[Redtruck-VA]

My math show .025 difference nothing....

 

[fannitti]

really i would think more

 

[Redtruck-VA]

Let see if I can get this right...

Measured from the hub flange:
4.25 with -19mm (.748") outter edge is 4.980"
4.5 with -12mm (.472") outter edge is 4.972

Difference of .008, little more than a hair

 

[!05RAM05!]

On your current wheels, the front spacing (just like back spacing) is 5.47" On the new wheels, your front spacing would be 5.74". About a 1/4" difference (0.27") farther out.

http://www.autolounge.net/calculators/tirespacing.html

 

[MonsoonMike]

http://lmgtfy.com/?q=7MM+to+inches


Not much of a difference. It's only 7mm..