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A pic for the truckers.

jon f mn

jon f mn

Well-known Member
I just got home and it's snowing. I was out taking pics of a trailer repair I'm going to post on tool talk. As I walked past the truck I saw this. The only difference between the front and rear tires is the fronts drive. I was running bobtail so the weight difference would be minimal. Quite a difference in temp wouldn't you say? lol
a111480.jpg
 
I've seen no negatives with them. Of course they are
still new and have good traction so that may change
when they get older.
 
I worked for a company a few years ago that had
them on the truck I drove and they were plain
miserable SOB's in snow and wet roads and this was
a twin screw truck I can't even imagine running
them miserable things on a single drive axle.
 
I wonder how much of that residual heat was conducted from the differential and axle housing that the tag doesn't have. I bet if it was a twin screw, the tires would look the same. That is a good example of efficiency, and not wasting fuel churning extra gears, and producing heat buildup. Our last transtar had a rear suspension like yours with rear air tag, and I grew to really liking it. On snowy roads and climbing the hills we have here you could drop the air to the tag and put a lot of weight on the drivers so they would bit through the snow and slush. The 5th wheel was centered between the rears so when you dropped the tag pressure, it also pulled the weight off the front axle. Once peaking a hill one needed to air up the tag again for steering control.
Loren. the Acg.
a111497.jpg
 
On this one the fifth is forward more almost over the drive axle. That helps keep the weight on the steer. To keep from getting to much up there the tag is computer controlled and always runs at a lower pressure than the drive.
 
Seems that, if I understood correctly Jon, you said this thing was all computer controlled.- Like instead of both axles sharing the weight, sensors apportion it, favoring the drive axle first? If so, must be it works!
 
2 1/2 hours later and this is what it looks like. This is amazing to me. That is a lot of residual heat from nothing other than drive torque and gear heat.
a111502.jpg
 
Son had super singles on his feed truck for a couple of years. He couldn't tell much difference in traction and a feed truck does get in to about every non-traction event a truck will find. Downfall was the nails construction crews leave at the hog sites. If he had a flat or threw a cap he was dead in the water and couldn't limp home. That's where old dad here came into play with a trailer with compressor and tools. The main reason for the singles was to save weight with the truck he used to have. He had to haul 24 tons of feed and that put him a twitch over 80,000lb. He has a lighter truck now so he went back to duals mainly because singles shot up in price. I think he mentioned somewhere in the $1100 range for a virgin super single. Jim
 
Like the looks of the super singles, but for the little bit extra weight I'll run doubles, at least if you blow one out, you don't have to stop right away, you can go 10 miles To a tire shop if needed without wrecking anything, that's the only bad thing about the super singles.
 
You cant lift the tag off the pavement when bobtailing or running empty with the new tractors. We always run with tag up when empty. If it was off thr ground we didn't have to pay tolls on that axle on the Tolways.
 
It does not come off the ground but it does dump all the air. The tag air bags are sometimes collapsed when running bt.
 
Another possibility, maybe has nothing to do with it.
By looking at the tracks, you backed into your parking spot. Could it be that the rear/tag tires picked up the loose snow & packed what was left. Thus there was nothing loose to stick to the forward/drive tires.
I have a couple slightly O T questions. How much weight do you get on the steering axle with the 5th wheel in that position? Is Dart an owner/operator, company equipment, or mixed type operation?
I remember seeing the yard in Eagan during my working days. Retired now, on the other lakeshore, about 7-8 miles east of you.

Willie
 
The tire were all clear when I parked. It's been and still is snowing. lol. When I hired on Dart was an all o/o company. About 4 years ago they bought out a company that had company drivers and another about 2 years ago. They have kept them going. They now have about 500 company and 2,000 o/o drivers. The steer axle stays between 11,000 and 12,500 at all times even bt.
 
Ok, shoots that theory about tires.
Spent my last 9 years at Koch, drove Volvos, retired in 02.
With the 5th a bit further back weighed 11500 on steering, full fuel & empty trailer. With it loaded to 33900 on drivers it went up to 11900.
Willie
 
The semis we bought had the super singles on them when we got them. They had half tread on them. After almost wrecking in a rain storm I took them all off. They will hydro plane terrible in water. The center of the tire bows up and traps the water in the center of the tire. Snow will do it as well. Jon's tires are real new with deep tread. The deep tread will help prevent the hydroplane issue but it still will tend to do it.

I also did it because of tire cost. I can put eight new tires on for 2/3s of what four new super singles cost. The weight gain was only 400 lbs per truck so I will take that over the cost and other issues with the super singles
 
I wonder if what you guys are referring to as super singles are the old single tires of years ago. They are different than those X one type tires jon has on his truck.
At a company I use to work for my 3 drivers and I have worn out many a set of Michelin X One tires on both the drive and trailer axles. While I have never been in snow with them the company has many trucks in the snow belt. I have used them in driving rain many times and never had a problem with only one blow out and I think that was the drivers fault because I think he ran it low on air.
 
John I am talking about the tires you drove on. This was just two years ago. I absolutely hated how they handled and drove. They where down right dangerous if you hit water covered roads. They would just hydroplane across. In light snow they where fine in heavy snow they where useless.

Either way they are long gone and I will not be running any more of them.
 
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