I'm considering Klutch ML7 wheels in 17x9 for my turbo Goblin. My OEM wheels are 18x7.5 with an ET (off set) of 42mm. If I'm figuring correctly, I need to move the wheel center line out 3/4" (19.05mm) (9"-7.5"/2) to retain the same backspace. 42mm - 19mm leaves me with a off set of 23mm to provide the same factory backspace. Is this correct? Stock ETs for this wheel are 25mm and 15mm. Custom ETs are 20-30mm and 0-15mm. I thought I go with an ET of 15mm for a little extra clearance.
My questions are these:
Are my calculations correct?
Does the Goblin require the same backspace as the stock Cobalt SS. I'm using the DF coilovers. Which leads to this question...
For those using 17x9 wheels, does anyone have an opinion as to the ideal off-set? Is it the same for front and back? Is an ET of 15mm a good choice?
My questions are these:
Are my calculations correct?
Does the Goblin require the same backspace as the stock Cobalt SS. I'm using the DF coilovers. Which leads to this question...
For those using 17x9 wheels, does anyone have an opinion as to the ideal off-set? Is it the same for front and back? Is an ET of 15mm a good choice?