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Old 08-03-2022, 05:36 PM   #1
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I get what your saying, and I agree, but wouldn`t it be nice not to worry about the car understeering in the first place?
I prefer a car that oversteers than a car that understeers.

I`m no engineer or expert, and I`m sure Porsche engineers designed the car to understeer for a reason, but you would be surprised how much of a difference a 225 tire makes at the front vs a 205 on these cars. I can take turns a lot faster with a 225 vs a 205 without trail braking. I like fast in fast out
Even my Cayman had understeer, and a lot more than the Boxster, and changing the front tires from 235 to 245 made a HUGE difference.
Hmmm, I'm surprised it makes a big difference. Good thing for me my local Firestone was busy until next week. I'll switch it to a 225 50 17 instead
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Old 08-03-2022, 05:41 PM   #2
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Hmmm, I'm surprised it makes a big difference. Good thing for me my local Firestone was busy until next week. I'll switch it to a 225 50 17 instead
Go with 225/45r17 if you have 255/40r17 at the rear. It will be a better match.
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Old 08-03-2022, 05:44 PM   #3
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Go with 225/45r17 if you have 255/40r17 at the rear. It will be a better match.
I know it may sound crazy, but I prefer a little more shock absorption by the taller sidewall. 112 mm vs 101mm sidewall

It raises the very important WAF (wife acceptance factor)
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Old 08-03-2022, 05:48 PM   #4
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I know it may sound crazy, but I prefer a little more shock absorption by the taller sidewall. 112 mm vs 101mm sidewall

It raises the very important WAF (wife acceptance factor)
I understand , but you are going to be almost an inch higher at the front vs the rear.
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Old 08-03-2022, 05:51 PM   #5
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I understand , but you are going to be almost an inch higher at the front vs the rear.


* update Somehow my calcs are wrong, Firestone is reporting the 255s at 25" and the 225 at 25.9"

Sooo yeah, almost 1 inch difference.

Last edited by DreamSign; 08-03-2022 at 06:02 PM.
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Old 08-03-2022, 05:54 PM   #6
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255 x.4= 102
225 x.5= 112.5

10.5mm to inches is .41 inches. Close enough for me.
https://tiresize.com/calculator/
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Old 08-03-2022, 06:05 PM   #7
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Thank you for that, I was busy doing it on my calculator.

Yeah, the 45 series is better. It would probably look weird .9" higher.
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