Rubbing the tire on the road, is it really mathematically simple?

I would think that total tire wear would be the same but wear per unit area would be different.

obviously all the wear is on one spot on the tire

na, it is distributed all along the tire face, not in one spot

Paul in Houston TX amok-crossposted: ^^^^^^^^^^^^^^^^^^ Please post here using your real name, “Paul in Houston TX” #74656.

What is the basis for your assumption?

F’up2 sci.physics

More importantly, it's hard on the steering linkage, which tends to be a lot more expensive to replace.

Mind you, with modern power steering, clueless drivers, and longer warranties, manufacturers have probably beefed up that part of the mechanism.

Still, when you trust your life to a machine, treating it well seems like a no-brainer.

Sylvia.

What they really say; Don't sweat the petty things but don't get caught petting the sweaty things.

I speak from experience! LOL

power steering is force multiplier, makes it easier to steer.

but along the way companies cheapend out the power steering, mostly the pump, and it is less reliable, in some cars not replaceable if it breaks, you can only get another from a junk yard and put it in, but it is just as bad, plastic tanks that crack....

true, I think all cars have power steering now, know of any that do not ?

When you are driving along the road, the tread stays gripped to the road surface. If it didn't you would be in deep s*it at the first corner. At speed, any speed, the tread blocks are sufficiently flexible to allow the wheels a small change in steering angle yet still remain gripping the road surface.

Rather than opinions, I'll direct you to relevant texts on the topic;

Tires, Suspension and Handling, Second Edition John C Dickson

Steering Handbook Editors: Manfred Harrer, Peter Pfeffer

If you really want to delve heavily into the mathematics of it all, then this book should do it;

The Automotive Chassis Engineering Principles, 2nd Edition J Reimpell, H Stoll, J.W. Betzler

The above cover steering, including tyres, from an engineering perspective and I suspect that's what you're after. The Along the way you'll get a good grounding on all the effects of steering geometry.

Plastics are the *new vanguards of planned obsolecence*.

Wide tyres, powerful engines and front wheel drive, with attendant torque steer, have guaranteed it.

Too slow. Go electric built-in. How to park in tight spaces -

I just got home and I have time now to read this detailed answer carefully, but it's been two weeks and many may miss my answer now, let alone if I wait longer, so this reply just addresses non-technical points.

To comment >micky amok-crossposted to sci.math, sci.physics, and rec.autos.tech: >^^^^^

Sure, but I was figuring "all things being equal".

"Mostly rolling", but if you integrate the sliding** portion over the time the wheels are being turned, I think the amount will equal no matter whether the car is going quickly, slowly, or not at all.

Maybe entirely.

Sorry, I can't abide by your request. People from the math group red my first question and they are interested in all the answers. Especially since you put so much effort into this one, I'd think you'd want anyone who might be interested to see it.

Plus I think it's a violation of Usenetiquette to drop groups. Were that done in 2 or 3 of the 3 groups I posted to, I'd have to read all 3 groups to see all the answers.

I dont' know who he is, but even if he's right, I only posted to 3 newsgroups.

The point is that when you steer the car while rolling, there is actually no sliding involved, or at least quite a bit less. This answer would be different if you were talking about a metal or wooden wheel. But when you turn a wheel with a rubber tire, the rubber tire twists. One way you can look at it is that the tread of the tire that is in contact with the asphalt is still aligned straight ahead, while the tread in front of that patch is angled to the left. There is indeed heating of the tire that comes from such distortion if the rubber, but this is quite distinct from the tire tread sliding against asphalt, which it doesn’t do.

A simple thing to notice is the sound your tire makes when you lock the brakes at low speed, which IS a case of kinetic friction. Do the tires make that noise when you make a rolling turn? Try it.

Hmm. That sounds right.

"Total tire wear would be the same". That's because of the law of conservation of tire wear. Or, iow, one does't get something for nothing so the wear would have to be the same. Or greater, but I don't see why it would be greater.

When the car is not moving, all the wear would be in one place, but surely when it's moving, the wear would be spread around the circumference of the tire.

I put back the other two groups. Otherwise I, and everyone else, has to read all three newsgroups to see all the answers.