Cetramatics or Spin Balancing?

Then tell me how a driver can spin a trailer(in a 180) and break a tire loose from the rim if tires DON'T move on the rims.

I never said you could spin the wheels inside the tires........

Although I'm sure it could happen......tires will probably break traction and spin first.

I said tires "Squirm" on the rims.

 

We're talking about two different things here. Certainly if you put enough side force on a tire it will break the bead loose from the wheel but what you're implying by your agreement with lowbudget was that a tire could move on the wheel enough to go out of balance.

But that's what we're talking about here, Example...

It can happen if you let your tire pressure drop to extremely low PSI but with proper or anywhere near proper tire inflation it's not gonna happen. To apply the torque needed to slip a properly inflated tire on the wheel you'd be breaking a driveline or some other driveline component first.

If you're turning tight enough to squirm a tire on the rim by sliding a tire sideways you need to figure out what you're doing wrong and correct it. There is never a valid excuse for turning so tight that you slide them sideways.

 

It depends on where you're operating.......never a valid excuse?????

Try having to turn around in a 180 turn where you have no other choice.

I'm talking at the end of a mile of lease road that ends on a drilling pad that's full of equipment. You have to turn around and it's in a 180. Turn around in an area that's maybe half again as long as your truck and trailer. Hard on equipment...you bet...destroys tires...that too. Did I mention loaded to gross weight and a trailer with fixed tandems???

Remember it was some other crew that set up the pad......not us.

I've seen tires broken off rims, tread torn off tires in big chunks and it plays hell on alignments and front end components.

And yes, I've seen freshly mounted tires with bead seating lube still visible on tire and rim actually spin inside the tire. Not much....but spin and squirm all the same.

You have to do whatever it takes to get the job done....sometimes at the expense of the equipment. Tires are usually the first casualty.

 

I've delivered to a lot of drill sites and have never had to tear up my equipment to get in or out of one. If I have to jockey it around for a while to get it out, So be it.

I pull a spread axle all aluminum trailer...You don't make tight u turns with those if you have a living brain cell.
Maybe company drivers do but if you're paying the bills you don't.

 

I've got to agree with blackw900 here. I'm not a trucker, but I have taken a couple of college level physics classes.

Unless I've been lied to by two different professors and two different textbooks the physics of tires slipping on the rim just doesn't work.

When you have two objects acting upon one another, being held together with friction & pressure (ie: tire & rim); it takes more force to overcome inertia of the stationary objects (relative to each other) than it takes to maintain motion.

So, once enough force was applied to the rim for the tire to slip on the rim, it would take less force to maintain that slippage, than was applied to initiate it. Therefore, one you started slipping, it would continue until the force was no longer applied. If this were to occur during braking, the rims would stop, and the tires would not. If it were to occur during acceleration, the rims would accelerate, and the tires would not.

 

On the original note, I still say centramatics. you only have to buy them once. When you get new tires, there's no need to have them spun. And as an earlier poster said, if you get snow or mud stuck up there, they will compensate.

 

I knew you would! That's the same reaction I had when I put mine on...

Maybe I'll put them on my trailer next!

 

What is the cost of the centramtics? Im thinkin about putting them on my steers.. What is the price and where could i get a good deal on them....

 

I just put a set of BF Goodrich steers on my truck. It was bad out of alignment. The old tires had spots in them and they dribbled like a couple of basketballs going down the road. I had the new tires put on at Loves and they balanced them on the auto spinner. I then took it to a shop out in Oklahoma and had the front end aligned. The shop that aligned it said they sold the centramatics but said there was no benefit to putting them on as long as the balance on the tires were done correctly.

I've not had any issue with my tires since I put them on. I believe if the tires are balanced correctly then putting centramatics on is just overkill.

The shop did say that centramatics is NOT enough to compensate for NOT balancing tires. He said they HELP but they are not enough to override an unbalanced tire. I also talked to an O/O in Georgia that had them and he said he still had to go get his tires balanced after he put them on. I'm not a believer in centramatics from what I've heard.