28" vs 26" tire
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What is the advantage of a 28" tire over a 26", other than it looks better? I am ordering a new rear end as soon as I figure out what size tire and gear to run. Does it depend on the power your car is making? I will be spraying a 200 shot out of the hole and am trying to make sure it sticks.
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a taller tire will actually hook better then a wider tire, its a old wives tale that fatter tires hook better but in truth its taller tires that do, of course i am talking about straight line traction here. if you want to look at it like this, imaging the tire as a balloon and you are looking up at the tire threw a glass table if you have a long balloon and a fat wide ballon both with the same air pressure and weight pushing them on the table you will find that they both cover the exact same surface area however the long balloons foot print will be better shaped for straight line traction. a good article on this can be read here. http://autospeed.com/A_108915/cms/article.html
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Tire selection should not be limited to looks only. You really have to think about your goals and what will work with your setup. Gear and tire selection should be done at the same time.
If you are running the times in your sig still and want to add a 200 shot to that I would go with 28" tall tire and something like a 4.10 gear if you are a M6
If you are running the times in your sig still and want to add a 200 shot to that I would go with 28" tall tire and something like a 4.10 gear if you are a M6
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Im in the same boat..26 or a 28in
Iv got 4:10s geting a new rear soon..Thought about 4:30s..and have been told even think about 4:56!!
I dont race a lot but when I do..I want to be happy with it ya know..
Iv got 4:10s geting a new rear soon..Thought about 4:30s..and have been told even think about 4:56!!
I dont race a lot but when I do..I want to be happy with it ya know..
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well I have an auto car, I was thinking of 3:89 gears w/ a 28" tire, but I dont know if that is to short of a gear on the street. Or possible a 3:70 w/ a 26". Its not my dailey driver but does see the street quit a bit. This is all good info guys!
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I agree w/ some of the prior statements esp regarding taller vs. wider tire. The more sidewall the better the tire will absorb the shock during a launch. But be sure not to overdo it b/c the bigger tire (28") can potentially slow you down. I'll go out on a limb and say 26's can work but when you start making more hp/tq they become real bitch to hook.
Those of you who are undecided should use the f-body gear calculator. This will help
you determine the best combo of gears AND tires.
--> http://www.f-body.org/gears/
I've had 3.42's & 3.73's with 26" tires and 3.90's & 4.10's with 26", 27" and 28" tires.
My personal favorite (for my combo) is 4.10's and 27's but that limits my trap speed on motor.
I'll prob go to 28's when the juice goes on (for the added mph).
Those of you who are undecided should use the f-body gear calculator. This will help
you determine the best combo of gears AND tires.
--> http://www.f-body.org/gears/
I've had 3.42's & 3.73's with 26" tires and 3.90's & 4.10's with 26", 27" and 28" tires.
My personal favorite (for my combo) is 4.10's and 27's but that limits my trap speed on motor.
I'll prob go to 28's when the juice goes on (for the added mph).
Last edited by cdubbzz; 01-26-2010 at 10:01 PM.
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Iv used that but I dont get what Im really doing..I assumeee that the numbers under each gear are the top speed for that gear at each rpm? idk im a retard when it comes to that stuff
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Here's the real deal for those interested.
Assuming all else equal, a larger diameter tire has the effect of reducing the tire/pavement interface force. In effect, reducing your numerical rear end gear ratio. This is exactly why everyone above recommends minimum 3.73 gears, since trying this combo with 2.73's would be equvalent to standard tires with 2.53's
.
Why in the world would anyone want to do this? Simple, because traction is defined as the friction force between the pavement and tire. If you exceed this force, you get tire spin. Reducing that force means you have a better chance of not exceeding that interface force.
Once at speed, the larger diameter tire means more mph for given rpm, albeit at the reduction of effective real wheel torque.
Than there's real world effects like sidewall flex that allow more contact patch. And why static problems only use two factors such as weight and co-efficient of friction, the traction problem is dynamic, with several other non-linear factors that need to be considered in the problem.
Lavoy posted a good link, but posted a bad analysis of the article for even at the end of that article they espoused the benefits of a wider tire over narrow.
Assuming all else equal, a larger diameter tire has the effect of reducing the tire/pavement interface force. In effect, reducing your numerical rear end gear ratio. This is exactly why everyone above recommends minimum 3.73 gears, since trying this combo with 2.73's would be equvalent to standard tires with 2.53's
![Barf](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_barf.gif)
Why in the world would anyone want to do this? Simple, because traction is defined as the friction force between the pavement and tire. If you exceed this force, you get tire spin. Reducing that force means you have a better chance of not exceeding that interface force.
Once at speed, the larger diameter tire means more mph for given rpm, albeit at the reduction of effective real wheel torque.
Than there's real world effects like sidewall flex that allow more contact patch. And why static problems only use two factors such as weight and co-efficient of friction, the traction problem is dynamic, with several other non-linear factors that need to be considered in the problem.
Lavoy posted a good link, but posted a bad analysis of the article for even at the end of that article they espoused the benefits of a wider tire over narrow.