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07-07-2008, 08:27 AM | #23 | |
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I know the theory, and in lots of places you are talking about how things "should" feel or operate based on what you have read on the boards and short test drive. Of course there is some difference, I just think people are exaggerating it way out of proportion. I actually own one of the cars and have put a couple of thousand km on it. It came with 18's and I have since switched to 19's ( I had originally hoped to keep the 18s as track rims but my bbk wont fit under it), and I am telling you that there is nothing in it. Granted, I did not take one out on a track, then switch wheels then repeat the process to isolate differences but IMO all the people above who are claiming night and day differences are talking crap. I could possibly grant you that perhaps the 18's had a smidgen more sidewall compliancy but that could be my imagination. Regards Mick |
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07-07-2008, 09:43 AM | #24 |
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Mick,
I too am under the impression that what ever there is will be small and it would take a very skilled driver to notice the subtle differences, but the fact remains that they are there no matter how small. I have also driven numerous cars with different wheel sizes and to be honest with you, there is more of a difference from changing tyre brands than you will notice changing rim size. The most notice thing apart from ride comfort when changing up rim size was how the car turns into the corner, with the bigger rim and lower tyre profile the turn in will be quicker, factional yes but it is there all the same. The other thing that can be noticed is the steering, lower profile means more tyre deflection from the surface which is less noticeable with a higher profile tyre. This assumption that acceleration or topspeed will lessen due to bigger rim size is something I can't work out, only if the width increase can the performance decease but I still think the width would need to be quite big to be really noticed. |
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07-07-2008, 10:21 AM | #25 | |
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I seem to remember a discussion paper (of either Porsche or Honda) on the effect of PCCB's where they approximated that a reduction in unsprung weight was the equivalent of a 4x reduction in sprung weight. i.e. lets say ceramic rotors saved you 5lbs per corner this would be the equivalent of taking out 20lbs from the car (eg seats or exhaust). This is obviously weight reduction for dummies and doesnt take into account weight distribution etc All I would argue is that the difference between the OEM 18's and 19's is insignificant in this regard and I bet if you put a vbox on the same car and tested 0-60's etc you wouldnt even get .1 of a difference in the outcome. Mick |
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07-07-2008, 01:07 PM | #26 | |||
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Might be wrong but it's how I understand it to be. Quote:
The only real reason for picking one over the other is personal preferrence. |
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07-07-2008, 03:34 PM | #27 | |
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11-04-2008, 04:03 PM | #28 | |
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11-08-2008, 06:16 AM | #29 |
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The 19" tires are slightly lighter than the 18s and that mass is even further away from the center than .5" for the rims. I doubt the difference between the two stock sizes is significant or even noticeable.
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