offset

[erickssf]

i was just looking at rims and i decided i do not want to get 20's on my whip so i was just woundering what should the offset be for a set a 18x10 and 18x9 also if 18x9 would fit the front. thanx

[gdmjoe]

.
The offset on an OEM 18" x 8" rim is 45mm ( ~1¾" ).

http://www.gdmjoe.com/frppmmrim.jpg
.

[ImpalaSlayer]

.
The offset on an OEM 18" x 8" rim is 45mm ( ~1¾" ).

http://www.gdmjoe.com/frppmmrim.jpg
.

is that positive or negative? i always get confused with those measurements. im gona say positive

[erickssf]

.
The offset on an OEM 18" x 8" rim is 45mm ( ~1¾" ).

http://www.gdmjoe.com/frppmmrim.jpg
.

also i was woundering if an 18x9 with an offset of+30 would fit in da front and if a 18x10 with the offset +40 would fit in da back? any one?

[Speed]

Man that offset confuses me everytime. gdmjoe really know his stuff when comes to this stuff he just recently helped me out but in the meanwhile check out the attached link it may offer you the information you need. It helped me out alot, at least got me going in the right direction.

http://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=1061930#Post1061930

[liquid]

By my calculations you would need +63mm offset on a 9" wheel, and +76mm offset on a 10" wheel, to avoid rubbing the fenders. Don't know what that will do for steering or shock absorber clearance though.

Do the math and see if it lines up with magindat (http://www.mercurymarauder.net/forums/showpost.php?p=346417&postcount=6)

[magindat]

By my calculations you would need +63mm offset on a 9" wheel, and +76mm offset on a 10" wheel, to avoid rubbing the fenders. Don't know what that will do for steering or shock absorber clearance though.

Do the math and see if it lines up with magindat (http://www.mercurymarauder.net/forums/showpost.php?p=346417&postcount=6)

Liquid's figures are very close. I run a 20x10 which I built by having a 20x8 widened. It comes to about +75 mm. On an 18x9 front - you cant lower or you will rub on bump steer. Also 18x9 will put you in a 40 or 35 series tire which will ride hard.

[magindat]

By my calculations you would need +63mm offset on a 9" wheel, and +76mm offset on a 10" wheel, to avoid rubbing the fenders. Don't know what that will do for steering or shock absorber clearance though.

Do the math and see if it lines up with magindat (http://www.mercurymarauder.net/forums/showpost.php?p=346417&postcount=6)

Didn't realize at first... Thanx for the credit! :D

[Joe Walsh]

FRPP says 6.295" backspacing....:dunno:
I've measured my OEM rims backspacing at 6.5" = OEM 18x8" offset is +50mm

http://www.motorcitymarauders.com/forums/showthread.php?t=7716

[erickssf]

oh ok thanxs u guys for all the help really use full i was woundering if any one knows some one with the saleen rims on a mm because thats what im trying to go with thanx?