ok guys i am ordering some BAD rockstars next week for my mitsu/dodge ram 50. 18x7s. what kind of offset will i need. i know it's like a 45mm, but whats that in inches? and also, how much modifications are gonna have to be done to the front firewall to lay? am i gonna have to tub or move anything other than fender wells?
low mazda
+1y
come on guys... no one knows anything about mitsus?
cookiemonster13
+1y
i would go to mightd50.com j murphy i think is one of the guys on there. they would know.
rimtucker
+1y
If i'm not mistaken I think you will need a 6.375 inch backspace on that size of a wheel. Well at least thats what I have on my Mitsu.
Low_SST
+1y
25.4mm= 1"
spoon
+1y
Edited: 1/19/2006 6:48:43 AM by spoon
18x7.5 with a +45mm is = to a 6" backside
low mazda
+1y
ok so is it a 6.375 or is it a 6.00?
rimtucker
+1y
Originally posted by low mazda
ok so is it a 6.375 or is it a 6.00?
I got my some Boyd Coddington wheels and I am almost positive the shipping label on the box reads 6.375 backspacing. I would need to check the box to be sure but I dont have them here at my house. I'll see if I can get to it by tomorrow.
low mazda
+1y
i called them earlier and they said they would do it with the 45mm offset. they know how to calculate all that stuff...
dssur
+1y
its pretty easy to learn
a 7 inch wide wheel is actually 8 inches wide lip to lip. So half of 8 is 4 to the wheel centerline, you know you need +45 offset from the center, 45mm = 1.77 inches, so you need at least 5.77 inches of backspace to have a +45 offset wheel.
DONT SKIP ANY STEPS for wider wheels, if you get a 7.5 inch wide wheel, it is 8.5 inches wide, half of which is 4.25, you need at least +57 offset with a 7.5 inch wide wheel (that is +45 + the extra half inch for the lip) so on a 7.5 inch wide wheel you would need 6.27 inches backspacing.