I found some wheels that I like...but....
01-24-2008, 11:23 PM
#21
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Join Date: Oct 2006
Location: Jax, FL
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RE: I found some wheels that I like...but....
This girl I used to work with had those rims in black chrome....they took so time getting used to but there ok in my book. Personally i like the deep dish rims.
01-25-2008, 07:03 AM
#23
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Join Date: Aug 2006
Location: Near Wash. DC Posts: 13,541
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RE: I found some wheels that I like...but....
ORIGINAL: CataclysmGT
Wider wheels do not reduce "downforce". The Force of Friction is what gives you grip. The formula for this is Force Normal x coefficient of friction. The cof is due to the rubber compound (how sticky it is, how it flexes etc). Force normal is the "weight" the care exerts downward at each tire. As you can see, nowhere in this formula does surface area (contact patch) exist. Surface area only changes pressure, which decreases with area. Since the pressure decreases, but the area increases, the force remains the same.
A tire has maximum grip at a certain operating temp. When this temp is exceeded, the cof drops rapidly, and therefore grips drops rapidly. Wider tires have more mass (more rubber), and more surface area. The mass means it takes more energy (heat........thermodynamics boys and girls) to raise the temp of the tire a degree. The increases surface area means the tire transfers this heat faster to the surrounding area, also preventing heat buildup. This means a wider tire will retain maximum grip longer then a thinner tire.
Wider wheels do not reduce "downforce". The Force of Friction is what gives you grip. The formula for this is Force Normal x coefficient of friction. The cof is due to the rubber compound (how sticky it is, how it flexes etc). Force normal is the "weight" the care exerts downward at each tire. As you can see, nowhere in this formula does surface area (contact patch) exist. Surface area only changes pressure, which decreases with area. Since the pressure decreases, but the area increases, the force remains the same.
A tire has maximum grip at a certain operating temp. When this temp is exceeded, the cof drops rapidly, and therefore grips drops rapidly. Wider tires have more mass (more rubber), and more surface area. The mass means it takes more energy (heat........thermodynamics boys and girls) to raise the temp of the tire a degree. The increases surface area means the tire transfers this heat faster to the surrounding area, also preventing heat buildup. This means a wider tire will retain maximum grip longer then a thinner tire.
Also by reduce downforce, i was reffering to in terms of sections of tire that are equal in size. my bad for not making that clear enough, downforce per square inch is what I was talking about, and when you reduce that you reduce the coeficient of friction. Your tire size would increase by 100% but you will only get 150% of your original traction instead of 200% because you didn't doubble the weight aswell.
01-25-2008, 09:18 AM
#24
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Join Date: Aug 2007
Location: Hollister, CA
Posts: 2,041
RE: I found some wheels that I like...but....
Temp, wear, coefficient of fiction still equals me not liking those wheels. Oh well, it's just my opinion! Give your car some lip! Its your car thoughdo what you want.
01-25-2008, 09:58 AM
#25
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Join Date: May 2005
Location: S.burbs Chicago
Posts: 4,793
RE: I found some wheels that I like...but....
Interesting, has me rethinking stuff.
So same car on a 255/50/18 will launch better than a car running 285/40/18 on the rear?
On public streets that is.
I have always known the skinnier tire has better wet/snow traction.
The prius runs a skinnier tire for less rolling resistance, better mpg........
So same car on a 255/50/18 will launch better than a car running 285/40/18 on the rear?
On public streets that is.
I have always known the skinnier tire has better wet/snow traction.
The prius runs a skinnier tire for less rolling resistance, better mpg........
01-25-2008, 10:30 AM
#26
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Join Date: Apr 2007
Location: North Carolina
Posts: 3,070
RE: I found some wheels that I like...but....
If you're going to get them, go with 5-spoke.
Always go with an odd number of spokes unless it's a split-5-spoke type of 10-spoke wheel sort of like the FR500's.
Always go with an odd number of spokes unless it's a split-5-spoke type of 10-spoke wheel sort of like the FR500's.
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