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Archive for December 1st, 2005
Uneven Wear - Line Haul Application
Posted by Tim on December 1, 2005
I am getting a lot of uneven wear on the tires on my trucks between 30,000 and 50,000 miles. I have had 3 axle alignments done, and the problem still exists. The alignment shop says the tires are either out of round or out of balance, the tire man says its the alignment?? The wear is on all or some tires (drive axles and steers.. sometimes just the steers.) We run mainly 2005 Freightliner Columbia’s and travel a lot of miles 25,000 to 30,000 miles per month per truck. Traveling throughout AZ, NV, UT, CO, NM and ID. We are also heavy on the way out 75,000 80,000 gross (5 axles) and come back fairly light 55,000-60,000 gross. The questions I have are: 1. What is causing the uneven wear (cupping, scalloping, whatever you call it). 2. What would you recommend for tire pressure 3. what kind of tire life should I expect. ( I am currently running a variety of tires, including Goodyear G302’s 297/75R22.5)
From a tire wear standpoint, your operation is slow rate of wear / low scrub. No matter what tires you use, it will be difficult to avoid uneven wear in this situation. Since you do run heavy half the time, you need to maintain 100 - 110 PSI in the tires to carry the load. Unfortunately, when you are running light, pressures in this range are making your irregular wear situation worse as the tires are "over inflated". It is difficult to say what kind of tire life you can expect. The good news is, all the major tire companies are making great strides in extending tire life through improved tread designs, compounds and tire footprint shapes.
Tires on Intermodal Equipment
Posted by Tim on December 1, 2005
Why do we have so many tire failures on the intermodal equipment we haul for rail roads and steamship lines….it seems quality and tire pressure, do you have any data that could help this issue…
The intermodal environment is tough on tires. The tires that most intermodal carriers want to use are made for highway service but the conditions at the railyard or port may be more like an off highway situation. To maximize tire life, in any type of service, maintain the proper inflation pressures, inspect the tires regularly, remove debris that gets into the tires and repair punctures (when feasible) before they result air loss and destroyed tires.
Mismatched New Tires & Mismatched Retreads
Posted by Tim on December 1, 2005
The law says not to mismatch rear dual tires (size or brand name). Is this not more inportant with recap tires?
I think it is equally important to have dual new tires matched and dual retreaded tire matched.