The Grand Prix GTP came with 16x8 wheels with 245 rubber. I would recommend
the 8" wide wheels. Weight is not an issue.
Dan Radcliffe
Sussex, WI
'82 Z-28 CP
-----Original Message-----
From: David K Yeung <dkyeung@juno.com>
To: autox@autox.team.net <autox@autox.team.net>
Date: Saturday, June 12, 1999 12:29 AM
Subject: wheel width vs. weight
>I'm faced with deciding between 16x7 vs. 16x8 inch wheels for my FWD
>Grand Prix using 245/45-16 tires. I don't know the exact weight
>difference between the two wheels but the 16x7 with a Yoko A032 weighs
>38lbs (18 lb wheels and 20 lb tire) and the 16x8 with a 245/50 Yoko Avid
>street tire weighs 49lbs.(guess tire weighs 27-30 lbs via manufacturer
>spec and wheel is 22-19lbs) The approximate weight difference between the
>wheels is therefore as much as 4 lbs.(the wheels are also different
>design, 16x7 is 5-spoke, 16x8 is crosslace).
>
>here's the $0.25 question...for autocross, is the extra inch wheel width
>a good tradeoff for the extra 4lbs per corner? wider or lighter?
>
>and whatever the answer is, it's not the whole enchilada. Since the
>wheels are different design, factors such as brake cooling and moment of
>inertia come into play.
>Dave Yeung
>Houston Region
>
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