Single & Dual Driven Axle Tandem Question

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then why do single axle trucks still get 300K+ on their tires with the same hp motors?

 

You happen to have a link to any study that shows that? Because unless you have found the holy grail of tire compounding, more traction load (among other things) will always equal more wear. I can promise you that the higher duty cycle of carhaul, or heavy haul, for examples, generate far higher wear rates than the same tires in line haul. The only way a 6x2 wears the drives at equivalent rates to a 6x4 is with a harder compound tire.

 

There's also a chart showing the results of a pulling contest on a gravel road in the report.


Here Richter, I did the leg work for you:

The same miles per tire, you said?




http://www.carbonwarroom.com/sites/...ing-Efficiency-6x2-Axle-Confidence-Report.pdf

Interesting read. Like I said earlier, there are benenfits to 6x2. Better traction isn't one of them. They are a viable solution for guys that don't deal with marginal conditions, and this study shows that you will still save more fuel than you will burn up in tires. If I did nothing but run up and down the big road, I'd jump all over this; but I'd be very hesitant the way I've always operated.

 

run 120 psi and you wont have wear problems

 

Putting your fingers in you ears and chanting your response repeatedly won't make it any more true!

Did you even read that link? You're always talking about wanting to learn. That is a very good analysis of 6x4 vs 6x2, that actually concluded that 6x2 is a valid option. I don't suppose you've considered that the fleets with hundreds of 6x2s have tried changing pressure seeking an optimum? And yet they still acknowledge that there is a dramatic difference in tire wear rates?

I think I'll call Conway's head of maintenance tomorrow:

"Hey, Richter said you just need to bump the live axle to 120 psi and it will take care of your wear issues."

"Really?!? That's awesome, we'll start today! I'll be sure and call Michelin and let them know, too! Geez, I can't believe we didn't think of this, give Richter an 'attaboy', wiil ya?"



Attaboy, Richter, attaboy.



/sarc

 

Richter I tried 120 lbs all that did was wear the edges on both inside and outside cause of over inflation. The only thing that improved the tire wear some was by going back to dual tires just because you have more foot print on the ground with dual but only 20,000 miles more. The traction was so poor I could break traction on wet pavement on a hill when loaded starting out from a dead stop it's just not a setup that's works for my operation to much weight and to many grades you just can't have tire costs of .05 a mile. If your running lite and on flat ground most of the time it would work.

 

After only a few thousand miles, I can already see a higher than normal wear rate on the drive tires. As for the tag, its almost as if they're not even wearing at all. To Slow the wear rate a little, I have decided to lighten the load on the drive axle by 5%. To offset the higher tire cost, I will run worn down drive tires on the tag axle and regroove as necessary. Hopefull, there will never be a need to ever purchase new tailer tires for the tag axle.
As for traction, I have been in rain, mud and dirt lots and have yet to see the need to lock the diff or regulate the air pressure on the tag. Certainly, snow and ice will be the ultimate test.

 

Read my post #25. Here we are on post #49 and you guys are still saying the same thing I said then. You are never going to convince each other he is wrong.

 

Priceless, and so very true....
How the 2 driven tires on a 6x2 can't wear more than previously being in a 6x4 configuration is beyond me. Same power going through half the tires.....Yep, tire wear!
Another false saving, besides for VERY few applications.
Ran them in England in a company truck, would never get them myself except for a lift (read 4th) axle.

Martin