Originally Posted by MacCool Unknown. I"m just running stock sport-package sizes Front: 245/40-19 Rear: 275/35-19. Some people prefer the looks of the bigger tires I guess. Doesn't do anything for
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06-13-2015, 04:19 AM | #31 (permalink) | |
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This is true. However, going wider sounds good since I'll be FI. And, I want to make sure my wheels are protected. Sent from my iPhone using Tapatalk |
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06-13-2015, 09:45 AM | #32 (permalink) | |
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Friction (traction, in this case) isn't dependent on contact area between tire and asphalt/concrete. It's only dependent on weight of the vehicle and the coefficient of friction (in this case, the nature of the tire compound). Given the same rubber compound, wider tires don't get you better traction. They CAN/DO create or solve sidewall problems. A wider contact patch can allow a softer tire compound such that the sidewalls can support the weight, but wider tire does adversely affect tire wear, as does the necessarily softer compound. Mind-blower, huh? Look it up. Many people are resistant to the concept that big wide tires don't give better traction, but it's a well-understood concept in physics. I remember the old sandpaper block experiments from high school physics my junior year. I've taken a lot of physics courses since then...neither the concept nor the formula have changed. The formula for friction is: Fr = μN where: Fr is the resistive force of friction (traction) μ is the coefficient of friction for the two surfaces (nature of the tire compound) N is the perpendicular force pushing the two objects together (weight of vehicle) Note that surface area of the contact patch between the two surfaces plays no role in figuring resistive force (friction/traction). If you prize sidewall stiffness as an aid to cornering then you'll actually want narrower tires. Narrower tires allow stiffer sidewalls if the tire compound is the same, as I believe it is in all of these summer performance tires across a given line. . Last edited by MacCool; 06-13-2015 at 09:54 AM. |
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06-13-2015, 10:39 AM | #33 (permalink) |
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Well, that's some great information there. Thanks for taking the time to type it. I didn't know any of that, so it's appreciated. Indeed, I would like to see pics of your S-04 protecting the wheel. Just so I can see how it looks. Thanks.
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06-13-2015, 01:43 PM | #34 (permalink) |
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Wider tires dissipate the heat better. So it takes them longer to get greasy if heat is causing the issue. If I were you I would go with the 285/35/19 on front and 325/30/19 on the rear RE-11 setup. I have on my car right now 265/35/19 front and 285/25/19 rear SO-4's. The SO-4's do not offer anything wider than 305/30/19's. I will be going wider when these tires wear out. I do not like the stretched look at all. There is a thread on here with the Nismo wheels and wider tires I speak of.
Link to thread. Why you should use these tires with NISMO Wheels: 285/35R19 (F), 325/30R19 (R) |
06-13-2015, 02:02 PM | #35 (permalink) | |
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06-13-2015, 03:01 PM | #39 (permalink) |
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You know, I think I came across a discussion about this on some thread a long time ago. Some people were saying that more width = more tread on ground = more traction. While others were opposing that idea. I know a very small portion of the tire actually touches the ground. And I thought the only way to increase that amount was through width. Though it may be just a small addition. I didn't know that wider tires dissipate heat better. If nothing else, that alone is worth going wider. Aside from a better more aggressive look, in my opinion. But taking it to a simple extreme, just a thought. So, say I take tires the width most Prius's use but a high performance tire like the RE-11. Then I take the Nismo's stock tire size in the RE-11. Let's just say both 19" and compare on same exact 370Z. I would think all I would do with the prius size is spin all day. It's a confusing concept to think other-wise. However, I am an opened mind and like to learn. |
06-13-2015, 03:04 PM | #40 (permalink) | |
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But those big ol' wide tires will sure look cool. Just like a real racing car . |
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06-13-2015, 03:17 PM | #42 (permalink) | |
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Contact area has nothing to do with friction, and increasing contact area won't increase your traction. Now, if you're going to track the car, then you'll want wider tires for the same reason race cars use wider tires...to keep them from getting greasy when you really push them on the track. I'd be pretty surprised if more than a few people here on this forum had the skill to push their Z, even an FI Z, that hard on the track where the difference between 325's and 275's would affect your ability to run the car. |
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06-13-2015, 03:20 PM | #43 (permalink) | |
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06-13-2015, 04:16 PM | #44 (permalink) | |
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At first I was all in on the RE-11's. But, as this thread went on I've heard more about the S-04. As well I have come by more threads on it. I'm still indecisive between those two. But tire rack has a decent deal going on the S-04, which is swaying me that direction. Plus, it's Wisconsin I live in, our weather is just stupid sometimes. I always have my Xterra around for that though. As far as size, based on everyone's help and suggestions. I think choosing a somewhat of a middle ground is best. I see what I have currently for size and I hate it to no end, I can post pics if anyone wants them. Grant it these tires are just crap. But, I do want wider, I just don't want to end up wider than what I am looking for. So, call it a stepping stone. I'll move up and when it comes time for new tires, if I want wider I'll go more wide at that time. I'm thinking 265/35 front and either 285/35 or 305/30 rear. Last edited by hermit; 06-13-2015 at 05:22 PM. |
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