What size would you guy recommend for the track?

 

what size rims...?

 

what size rim?

what budget?

what suspension?

what driver ability?

what kind of track? (road course or 1/4)

 

yes i meant all of those as well

 

road coarse
r compounds
lets just say price is not a factor
im going to buy wheels based on whether i will use 205 or 215

 

What wheels?!

 

so now it's 205, 215, and 225?

what about road fine?

 

haha, sorry about that. NOT 215, as I said right before I have stock wheels, but I would like to know which tire size would be better for hpde's, so then I can pick my wheels based on the tire size.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by answer3 &raquo;</TD></TR><TR><TD CLASS="quote">as I said right before I have stock wheels </TD></TR></TABLE>

Where did you state this?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by answer3 &raquo;</TD></TR><TR><TD CLASS="quote">I would like to know which tire size would be better for hpde's</TD></TR></TABLE>

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That's just in the ITR forum alone.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by answer3 &raquo;</TD></TR><TR><TD CLASS="quote">so then I can pick my wheels based on the tire size. </TD></TR></TABLE>

Why would you say this after specifying that you want to buy tires for your stock wheels?

 

i just got owned

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by answer3 &raquo;</TD></TR><TR><TD CLASS="quote">haha, sorry about that. NOT 215, as I said right before I have stock wheels, but I would like to know which tire size would be better for hpde's, so then I can pick my wheels based on the tire size. </TD></TR></TABLE>

Wider is better, didn't you learn anything from watching Pontiac commercials?

(Weight and aero drag notwithstanding)

But seriously, 225 will give more grip on a properly sized wheel, than a 205. And you'll have more surface area to suck up and expel heat, so your tires won't overheat as easily.

National autocross champions have used 225's to win. It has been 'the' competitive width for a while. This is on a stock rim, too, because the rules are stock rim width, with only +/- 5 mm of offset (they use spacers to stop the rubbing in the rear, and maybe front depending on tire.)

Your name is "answer3", but you ask a lot of questions. Is this like Jeopardy? Are you Alex Trebek?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">
But seriously, 225 will give more grip on a properly sized wheel, than a 205. And you'll have more surface area to suck up and expel heat, so your tires won't overheat as easily.
</TD></TR></TABLE>

what?

 

What about for road courses, and I never seen the pontiac commercial. I was also thinking that going with a 225 tire and a wider whee, like a 15x7l would add more weight than going with a 205 sized tire on a 15x6 or 6.5 wheel.

 

have you driven on track yet? I'd start with that and worry about tires later, and when j00're ready to start on r-compounds, go with 205s as they are cheaper.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">

what?</TD></TR></TABLE>

What what? A wider tire will take longer to overheat than a skinny tire. If they're sliding at a certian slip angle, each will be doing a similar amount of work, but the 225 tire will have 10% more rubber to absorb the heat, and 10% more surface area to radiate/conduct the heat out of the tire.

The net of it is, each square inch of tire will be doing 10% less work on a 225-wide tire than a similar 205-wide tire.

-Chris

 

I don't think simple math should be used when it comes to tires

But I'll bite, 10% more of the tire will also be doing 10% more heat generation...so that kinda throws the whole thing out of the window, no?

 

Bringing math into this loses me entirely hahaha.

As for the thread maker. You seem like you have little to no track experience soo start with your stock 15x6 rims and get 205s. I have them they handle great. Get some azenis, they are cheap. Once you get some experience and want MORE out of your car, and you CAN drive it to that ability, spend some cash on some upgrades.

You must walk before you can run.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totsie7944 &raquo;</TD></TR><TR><TD CLASS="quote">Bringing math into this loses me entirely hahaha.

As for the thread maker. You seem like you have little to no track experience soo start with your stock 15x6 rims and get 205s. I have them they handle great. Get some azenis, they are cheap. Once you get some experience and want MORE out of your car, and you CAN drive it to that ability, spend some cash on some upgrades.

You must walk before you can run.</TD></TR></TABLE>

Furthermore, starting out on r-compound tires is not only dangerous and a stupid/wasteful thing to do, but also detrimental to the whole learning process....and i speak from experience.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">Furthermore, starting out on r-compound tires is not only dangerous and a stupid/wasteful thing to do, but also detrimental to the whole learning process....and i speak from experience.</TD></TR></TABLE>

I concur.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">

Furthermore, starting out on r-compound tires is not only dangerous and a stupid/wasteful thing to do, but also detrimental to the whole learning process....and i speak from experience.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mugen Mike &raquo;</TD></TR><TR><TD CLASS="quote">

I concur.</TD></TR></TABLE>

So do I.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">I don't think simple math should be used when it comes to tires

But I'll bite, 10% more of the tire will also be doing 10% more heat generation...so that kinda throws the whole thing out of the window, no?</TD></TR></TABLE>

True and not true. I over-simplified. And looking at the math, trying to calculate the energy in a tire of a car going around a corner would be somewhat difficult.

If the g-force is the same, and the speeds are the same, both tires will generate the same heat due to friction. Heat will be distance times force (coefficient of friction of rubber on asphalt, times the weight of the car).

If the same slip angle and same cornering forces are applied, they'll both generate the same amount of heat, but the 225 tire will have more surface area.

So, let's say maybe the 225 tire gets 2% more grip? Sounds reasonable.

Centripetal acceleration = v^2 / r .. so 102% of the acceleration gives only the square root of that in more velocity(distance per second). (100.995%) So, with the same slip angle, the tire is traveling 101% farther per second because of the grippier tire and faster cornering speed. And the centripetal force will vary linearly with centripetal acceleration (Fc=mAc), so a car that has 1.02G will make (101% * 102%) 103% more heat per second at the tire than a car with a 1.00G cornering acceleration. Still not enough more heat to counteract the size difference.

Another couple extreme examples, If you ran the track in your small spare tire, you'd melt them. If you ran the track with 450 wide tires, or cut the car weight in half, the tires would be harder to warm up.

-Chris

 

haha, i'm not even reading the math, if j00're going around the corner at the same speed then the 225 tire is obviously not faster than the 205 tire now is it.

maybe the 225 tire will be negligibly c00ler than a 205 tire when going around the track at same speeds, but i doubt it would be anything that one would notice, and i would definitely not use it as a selling point for the wider tire...since obviously ppl try to go as fast as they can on their tires...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">
Another couple extreme examples, If you ran the track in your small spare tire, you'd melt them. </TD></TR></TABLE>

no, i'd go slow

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">
If you ran the track with 450 wide tires, or cut the car weight in half, the tires would be harder to warm up.
</TD></TR></TABLE>

no, i'd go fast

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg &raquo;</TD></TR><TR><TD CLASS="quote">So do I.</TD></TR></TABLE>

Same here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris N &raquo;</TD></TR><TR><TD CLASS="quote">

Same here.</TD></TR></TABLE>

j00 done c00ling off, p00kie?

 

who you callin p00kie... pikus.