315's on a V6???

[onspeed]

Re: 315's on a V6???

With the same diameter tire, same load, and same pressure, a wider tire will have a wider contact patch. However the overall contact area will not change by a significant amount. Anyone who doesn't believe this is a fool.

The reason a wider tire will give more cornering grip is because lateral grip is based on tread stiffness, width of contact patch, and length of contact patch. With wider size tires, the sidewall height is usually reduced, thus making the tire stiffer.

[Blizzard242]

Re: 315's on a V6???

With the same diameter tire, same load, and same pressure, a wider tire will have a wider contact patch. However the overall contact area will not change by a significant amount. Anyone who doesn't believe this is a fool.

The reason a wider tire will give more cornering grip is because lateral grip is based on tread stiffness, width of contact patch, and length of contact patch. With wider size tires, the sidewall height is usually reduced, thus making the tire stiffer.

You're just hard headed ain't ya? You're throwing in assumed variables like sidewall height to support your theory. However the problem is, you were the only one who assumed that part. Whoever said anything about changing sidewall height before? Thus, you suck.

I am done arguing this because you know you're wrong. You just can't admit it. I can deal with that. I have a friend that is exactly the same way. Have fun!

[usp55]

Re: 315's on a V6???

wow i didnt mean to start a fight here lol. anyway a 275 is a narrow as i would ever go. i think im still gona do the 315's cause i just think they look so badass

[Blizzard242]

Re: 315's on a V6???

wow i didnt mean to start a fight here lol. anyway a 275 is a narrow as i would ever go. i think im still gona do the 315's cause i just think they look so badass

Hey go for it, to each their own. Some like halo headlights, some do not. Some like euro tail lights.. I do not. Make your car how you want it, you're the one driving it. :rock:

[usp55]

Re: 315's on a V6???

Hey go for it, to each their own. Some like halo headlights, some do not. Some like euro tail lights.. I do not. Make your car how you want it, you're the one driving it. :rock:

oh beleive me i do, hell most people either love my car or hate it already. i was more concernd with a dramatic loss in power (its not like i race this thing anyway though)

latest pic before grill inserts were added to body kit and scoop. and soon to be TT2's 17x9.5/11 custom painted DSG to match the body color

[Blizzard242]

Re: 315's on a V6???

oh beleive me i do, hell most people either love my car or hate it already. i was more concernd with a dramatic loss in power (its not like i race this thing anyway though)

I don't know how much it would be, but i'd be more concerned about gas mileage. Something like that could potentially cost you a lot.

Ah dude that looks slick. Damn front license plate laws. I don't obey em.. it's been brought up every time I've been pulled over but the only ticket I've gotten in 4 years was for a seatbelt once. That cop was apparently having a bad day.

[onspeed]

Re: 315's on a V6???

You're just hard headed ain't ya? You're throwing in assumed variables like sidewall height to support your theory. However the problem is, you were the only one who assumed that part. Whoever said anything about changing sidewall height before? Thus, you suck.

I am done arguing this because you know you're wrong. You just can't admit it. I can deal with that. I have a friend that is exactly the same way. Have fun!

You're a ****ing idiot. This isn't my theory. Its all proven using mathematical formulas. Car and Driver even explained this in their August 08 issue. Go do some research before you say I'm wrong.

[usp55]

Re: 315's on a V6???

well my last two tanks got me 23 and 24mpg respectively and it wasn’t like i was rolling in on fumes to the gas station either. if i was really concerned about gas i wouldn’t be driving a camaro but good point to bring up, ill see what kind of a change when i get them on there in prob less than two weeks

hey thanks. yea i have some really hardass cops from time to time in my area, some are fbody owners too ( lets just say i got to know them well from over the past 2 years lol) mostly for tint and i have never gotten a speeding ticket ever

[Forced_Firebird]

Re: 315's on a V6???

for explanation, refer to the last page of the june 08 issue of car and driver ( franz kafka's garage). Or it could be july... i'll check later.

but if contact patch is weight/air pressure then....

3500/27=129.62

decreasing the pressure to... say 25psi

3500/25=140

Correct multiplication and division are communitive -- 129.62 or 27 can be divided into 3500 and you get the other as an answer.

So you're telling me that if you place a wider tire on the vehicle using the recommended pressure, it *somewhat* doesn't take the same effect as lowering the pressure in the existing tire?

I know we are talking about minute numbers, but you can't say they have no effect. Perhaps a stock-like V6 won't take notice of such effects, but when in competition every 1/2hp or .01 second can win/lose a race.

You have the idea right where the air pressure has exponentially more effect on traction than the width of a tire, but when you say...

tire sizing has no effect on contact patch.... just fyi
Today 11:32 AM

it's not entirely true. The tread pattern as we know can also have a large effect on traction, along with compounds, profile along with width. I thought this was all more about how the tire looks.

[onspeed]

Re: 315's on a V6???

forgot to edit that. It has an insignificant effect on contact patch.

however, i'm trying to say that a 215/50/16 has relatively the same contact area as a 265/50/16. Its not wider tire = more contact.

[Forced_Firebird]

Re: 315's on a V6???

forgot to edit that. It has an insignificant effect on contact patch.

however, i'm trying to say that a 215/50/16 has relatively the same contact area as a 265/50/16. Its not wider tire = more contact.

Well, let's convert that to inches.
a 215mm wide tire is 8.46" at it's widest point (not to be confused with tread width) and a 265 tire is 10.43". Now bump that up to 315 and you have 12.40". That's almost 50% more width with the same inflation pressure going from a 265 to a 315.

Now, here's wher you are comming from (the longitudal side of the argument)...

A tire that wide need to have a shorter sidewall to have the same total diameter. This means as the tread gets wider, the longitudal contact gets smaller due to the stiffness of the side wall, which is understandable.

*but* when you add almost 50% to the width and decrease the longitudal contact - the difference in contact area may be justifed. ie: you are just changing the shape of the patch to maximize contact pending fitment on the vehicle.

[onspeed]

Re: 315's on a V6???

yes. That is EXACTLY what i've been trying to say. However, everyone else seems to believe otherwise and use the bicycle tire vs car tire to say i'm wrong. I'm glad someone here isn't complete dense.

[Cobalt camaro]

Re: 315's on a V6???

I understand what you are saying, he's saying there isn't much of a difference from 275 to 315 which is true. But one thing that you should be looking at is power to grip. I'm betting unless you have some good mods your not gonna be spinning 275's, plus the 275's will be cheaper. It's up to you but i would go 275 max no need unless you got some power.

[RadRacer]

Re: 315's on a V6???

If you're worried about it being too big of a tire and losing MPG and such due to increase traction, then why not just get some 315's but in a ****ty tire?!?

[Blizzard242]

Re: 315's on a V6???

Onspeed.. i know this is late but, how about we add the word "possible" to contact patch. We understood your concept but it was like we were all arguing along different but parallel lines.