Drifting, hellaflush, slammed, tire stretch blog/bash thread.

[vex]

Originally Posted by sofaking

@Vex, that's the point. There are no hard facts about it, there haven't been any studies to my knowledge that prove this one way or the other. I can only go by my experiences and stretching tires works for me.

Absence of evidence is not evidence of absence.

When you say it doesn't work and quote joe_blow1 or joe_blow2 it doesn't make any difference how they THINK it should work. I've conceded that I believe there are some stretches that are probably too aggressive to be safe, but that doesn't mean that I believe all tire stretching is unsafe.

I never said it doesn't work. That's just silly. I stated that it's not wise, and would prove detrimental to the tire. I've provided facts on the nature of rubber and the mechanics that will cause issues. Whether or not you believe me is your call.

[sofaking]

Originally Posted by vex

Absence of evidence is not evidence of evidence

I have experienced stretched tires. Thus my information seems more "real world" than theory. I find that whenever people discuss how things should work, and how things do work, it's completely different most of the time. Example: If you had never worked on a car before and you grabbed a Chilton's manual and decided to rebuild your motor, you would run into problems that aren't explained that real world experience would solve.

Originally Posted by vex

I never said it doesn't work. That's just silly. I stated that it's not wise, and would prove detrimental to the tire. I've provided facts on the nature of rubber and the mechanics that will cause issues. Whether or not you believe me is your call.

"Could prove detrimental". Based on your lack of evidence you can't say that its a certainty, thus your information is not any more correct than mine.Theory is not proven, that's why there's a special word for it.

As for the tire inflation, I keep the tires at a reasonably high pressure setting of 40psi to maintain that the lack of flex in the elastic region. The thing is that you're arguing that I don't want my tires to act the way I actually want them to act. This is a preference, telling someone how they should prefer something is... useless. Technically I'm sure I'm putting more pressure on the sidewall than the manufacturer recommends, but I don't think it's more than the tire can take. If the tire can hold up to constant flexing from racing a car and being throw into corner after corner, it doesn't seem (to me) like it wouldn't be able to take that pressure as a constant. Otherwise it would be very common for people to have the sidewall blow out of their tires while racing. Obviously this is my personal opinion on the matter, just like you have yours. Without hard technically data that I can't prove my point and you can't prove yours. Your information is speculation and theory. My information is real world testing on my car (that I'm sure can be effected by a million different factors that I can't measure), my experience says it works though without detrimental effects.

@RotorDad I did join just to argue. But that doesn't mean I'm not reasonable. If proven wrong I can admit it. The problem with this argument is that it's just like religion or politics. It can't be proven one way or the other yet people are talking like there's some proof. You can only argue your opinion on these matters, stating them as fact is inaccurate at best. Thanks for the welcome.

[vex]

Originally Posted by sofaking

I have experienced stretched tires. Thus my information seems more "real world" than theory. I find that whenever people discuss how things should work, and how things do work, it's completely different most of the time. Example: If you had never worked on a car before and you grabbed a Chilton's manual and decided to rebuild your motor, you would run into problems that aren't explained that real world experience would solve.

You seem to be missing the point.

"Could prove detrimental". Based on your lack of evidence you can't say that its a certainty, thus your information is not any more correct than mine.Theory is not proven, that's why there's a special word for it.

Show me where I said could.

As for the tire inflation, I keep the tires at a reasonably high pressure setting of 40psi to maintain that the lack of flex in the elastic region.

You do not mean what you think you mean. Let me give you a little example:

Plastic deformation is never good in such a thing.

The thing is that you're arguing that I don't want my tires to act the way I actually want them to act.

...What?

This is a preference, telling someone how they should prefer something is... useless. Technically I'm sure I'm putting more pressure on the sidewall than the manufacturer recommends, but I don't think it's more than the tire can take.

From whence cometh this surety?

If the tire can hold up to constant flexing from racing a car and being throw into corner after corner, it doesn't seem (to me) like it wouldn't be able to take that pressure as a constant.

Again, apples and oranges. Momentary load in the elastic region will not cause plastic deformation of the tire.

Otherwise it would be very common for people to have the sidewall blow out of their tires while racing. Obviously this is my personal opinion on the matter, just like you have yours.

Mine's not opinion. I'm stating material mechanics.

Without hard technically data that I can't prove my point and you can't prove yours. Your information is speculation and theory.

Actually, mines based on material mechanics which is a proven science. Additionally you can test them yourself. I'll explain how following this.

My information is real world testing on my car (that I'm sure can be effected by a million different factors that I can't measure), my experience says it works though without detrimental effects.

Your experience is limited, and based on false presumptions.

Take a brand new tire prior to mounting. Measure all dimensions and record them. Stretch your tire and mount it. Run it a few times on the track, then remove the wheel and measure again. Are the measurements going to be the same? Depending on the amount of stretch will dictate whether you're in the plastic or elastic region of the material. Do the same with a non-stretched tire, dimensions will be almost if not identical.

If you're stretching the tire outside of manufactures spec and then putting lateral load on the tire I guarantee you will be engaging in the plastic region.