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Old 07-21-2004, 03:09 AM   #1
Scooby Specialist
Member#: 54885
Join Date: Feb 2004
Chapter/Region: MAIC
Location: NYC/WV
2004 PSM STi
2006 Mazda MX-5 Race Car

Question Gram Lights 57s tire/wheel weight question

I just ordered a set of Gram Light 57s in 18x8.5, which turned out to be a lot heavier than i expected (21.6). However, the price was very right, and I plan to use my stock STi wheels with some Toyo RA-1s on track days. What I would like to do is try to get the Gram Lights + tires to weigh the same, or as close as possible, as the stock bbs +bridgestones . I have been able to conclude that the stock wheel/tire weight is about 42.5 pounds (with new tires). The lightest tires (235/40/18) I have been able to find for the 57s are the Toyo Proxes ts-1 (21.9) and kumho ecsta mx (~22). These two tires would still put me a pound over stock weight. My question is, how much real world effect would an extra pound of unsprung weight on each corner have? and are there any other tires worth looking into? Any info would be greatly appreciated. Thanks

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Old 07-21-2004, 11:02 AM   #2
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Originally Posted by MattSTi
how much real world effect would an extra pound of unsprung weight on each corner have?


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