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First, the US DOT doesn't require wheels to have specs written on them - unlike tires. Because of this, you need to be careful if they do publish specs. The wheel manufacturers aren't under the same scrutiny tire manufacturers are, so wheel manufacturers tend to make mistakes more often - in...

3DDavwe said: "AFAIK the only people in the RV industry to ever truly suffer for their actions was Goodyear, who sold tires to it. They make a truck tire for low-range vehicles that works perfectly; got to move furniture or a bunch of lumber 20 miles? Great. They can do that until the rubber...

Anyone understand how plysteer affects vehicles? My questions: If plysteer is present in all tires, pushing to the left, and it compensates for the road crown, why isn't it a problem in places where they drive on the left side of the road, like the UK? What about on flat roads? Is plysteer...

Unfortunately tires on a road surface don't follow conventional friction theory, so the physics is different.

Thinking about this a bit further, the issue is the amount to torque being supplied to wheels. If the torque is capable of being throttled down to zero, then even at zero load, a tire on a road surface will have enough grip not to spin the wheels=- regardless of whether the truck is 2WD or 4WD...

I am puzzled by your question. You talk about trucks, then mention planetarium. If we are talking about trucks on the road, you'll get one answer (roads have texture, and therefore grip from the tires). But if we are talking about smooth, untextured surfaces like a steel plate, then the...

Look, I'm not saying raising the cost of energy doesn't have its problems. But what are we supposed to do - sit back and complain? We're engineers. We're supposed to know how to fix problems. This is just a difficult one! With lots of side issues. So what if the government taxes energy and...

I think your premise is wrong. There are lots of batteries that last more than 2 years. But do I think EV's are the answer? No! I think the answer is reducing our energy consumption. I favor making energy consumption expensive! That way, people will start to think about how much they are...

I am going to guess you won't find anything that works. Forklifts generate a lot of torque and the bonding between rubber and steel isn't very good, so many times the steel is coated with brass or bronze. The copper in those adheres well to rubber. Let us know what happens. We could all learn...

BrianE22, There are standard tire uniformity measuring machines - TUG machines (Tire Uniformity Grader). They operate at slow speeds. But tire uniformity behaves differently at high speeds. I'll bet that machine you declined to quote was a high speed machine as those are generally one-offs...

First, thanks to all for the replies. I am especially grateful for the respectful tone everyone has taken. This could have devolved into name calling. My original question was "Do they still do this?" The response "They never did this." is a subset of "No!" OK I accept that. I was hoping I...

Posted by pmbrunelle: "Were wheels produced with a single (nominal) dimension of runout (perhaps optimized for a certain statistical variation of tire uniformity), or were there different part numbers, with each part number having a slightly different runout dimension?" Here is my...

Wow, so many responses! But clearly there are some misconceptions. First, I am a tire engineer - retired. At one point in my career, I interacted with Ford Light Truck Engineering in Dearborn. It was there that I learned about off-center boring. And perhaps off-center boring is a misnomer...

Does anyone know if any vehicle manufacturer still requires their wheels to be bored off center in order to compensate for tire uniformity? BACKGROUND: Automotive wheels pilot on the center hole of the wheel rather than on the lugs. Some time back some vehicle manufacturers would have their...

cibachrome, So you are saying that computer modeling of vehicles with trailers is something that is done - and for that, you need trailer tire data. OK, makes sense.

Tire engineer here! I worked in design, testing, quality, and application. I agree with Greg. It doesn't seem to make sense. First, the writer is obviously not a native English speaker, so there may be some confusion in the translation. Second, there are things that just do not make...

Greg Locock said: " ..... One that people don't think about is trailer tires. ...." OK, I gotta ask: Why? GEspo: That link took me to a discussion page. The tires in those photos look to me like cold tires driven hard. I've seen this before on some street performance tires driven on a track.

cibachrome, I am glad you chimed in. I wondered if any OEM tested off the shelf tires, especially hard-core grip tires. I would like to hear from others. But my point stands. OE tires are different than aftermarket tires and people need to be aware of that.

A word of caution here: I think most of the folks responding work for an OEM and their data is of OEM tires. That's important because OE tires are different than aftermarket tires in that OE tires are designed to OEM specs, which usually include rolling resistance as an important parameter -...

Have we established that you are driving to the off road location and lowering the pressure there, then just before getting back on the pavement, raising it back up? If not, let us know what you are doing. I'm going to assume that is the case. So what I know about rim width is that the...