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post #1 of 7 (permalink) Old 11-14-2013, 07:44 PM Thread Starter
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20s

Ok I'm planning of getting a 20"x8.5" wheel with a +42mm offset and a 245/35/20 tire size. Does anyone know how this will sit the car is stock height at the moment but do plan on dropping 1.5"-2" down the road
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post #2 of 7 (permalink) Old 11-14-2013, 08:58 PM
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The tires are only .2 inches larger in diameter than a 225/60 16 which is a stock size, one of the many tire size calculators on the web would be a good place to start comparing.

--
97 Mark VIII LSC/Silver/Gray leather
97 Cougar 4.6 Sport/White Opalescent Tricoat Metallic /Gray leather down but not out?
89 Cougar LS 3.8/Oxford White/Gray velour/HG need replaced AGAIN
00 Grand Marquis LS/Vibrant White/Gray velour
63 Falcon 302/black and rust/shed isn't moving
82 F-150/Oxford White/dumb VV carb doesn't pass emissions
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post #3 of 7 (permalink) Old 11-14-2013, 11:40 PM Thread Starter
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I know height wise I'm talking offset clearance
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post #4 of 7 (permalink) Old 11-15-2013, 11:32 AM
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All,

.09" Deeper width ! Try http://www.rimsntires.com/specs.jsp?...&text1=&text2=

Good Luck,
Sonny
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post #5 of 7 (permalink) Old 11-16-2013, 08:46 AM Thread Starter
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That link is freakin awesome thank you so much
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post #6 of 7 (permalink) Old 11-16-2013, 11:30 AM
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That is a cool site, here is that page with what I am running on my 97 Mark VIII (and ran on my 97 Cougar, 89 Cougar with the old spindles, and 89 Cougar with 93+ spindles). I have to run a 3~5mm spacer so they don't rub on the 93+ spindles.

As most of the aftermarket 9 inch wide 17 and 18 inch wheels for our cars are 36mm, 42mm with 8.5 inch wheel is the same backspacing, so be .5 inches more sunken in but with the same 6.4 inches of backspacing (I don't know what the offset for factory 15 or 16 inch wheels are, but measured backspacing is 5 inches, 5.5 inches to the lip).

http://www.rimsntires.com/specs.jsp?...&text1=&text2=

--
97 Mark VIII LSC/Silver/Gray leather
97 Cougar 4.6 Sport/White Opalescent Tricoat Metallic /Gray leather down but not out?
89 Cougar LS 3.8/Oxford White/Gray velour/HG need replaced AGAIN
00 Grand Marquis LS/Vibrant White/Gray velour
63 Falcon 302/black and rust/shed isn't moving
82 F-150/Oxford White/dumb VV carb doesn't pass emissions

Last edited by Bangster; 11-16-2013 at 11:38 AM.
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post #7 of 7 (permalink) Old 11-19-2013, 02:44 PM
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I've got a 20X9 with +36 up front. That 20X8.5 will have the same backspace as my rims, but sit 1/2 inch further inboard. This isn't a great pic of the front wheels, but you can see how they sit in relation to the body.

http://www.sccoa.com/forums/garage_a...tach_type=full

'89 T-Bird M5R2
433 RWHP/ 424 RW torque
2.0L AutoRotor Power
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