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Tim Miller
Marketing Communication Manager
Goodyear
(330) 796-7922
Tim Miller has been with Goodyear for over 30 years. He spent 8 years as a tire design engineer before taking positions as a technical representative to original equipment customers Freightliner...more»»
tire wear heavy truck
Posted by greg from ottawa, ON, CA on September 10, 2009
Hi Tim
tire size 11.00 r 22.5 aggrssive lug (4 month old)
international 5000 series tri-axle dump. neway air ride 46,000 cap.
left side front drive axle inner tire only shows a distinct wear pattern on the inside of the tire only. every 2nd lug on the inside row shows a step pattern developing & every second lug is ok.
the suspension was completey rebushed in the may.
any thoughts
thanks
greg
Diagnosing a wear condition is difficult without seeing the wear pattern and the vehicle the tires are on. But, you are the second person this week to bring up this type of wear on a drive axle. I asked a tire wear expert for some advise on this and he suggested to possible problems. One is wheel bearings. He said that if the wheel bearings are not tight on the axle where the wear condition occurs, this can be the source of the problem. Also, there seems to be an issue with excessive axle flexing that when combined with tires sensitive to this wear can cause a problem.
Increased Fuel Usage from a Change in Tire Size
Posted by Erwin from NANJING, OT, CN on September 9, 2009
I changed my customer’s tire on the tractor and the trailer from 12.00R20 to 315/80R22.5. The treadwear mileage of the tire was increased. but the fuel usage was increased,too What’s wrong? How to solve this problem?
If I change the tire from 295/80R22.5 to 315/80R22.5, will fuel usage increase, also.
First of all, you went from a tire that was about 44 inches in diameter to one that is about 42.5 inches in diameter. So, unless you made and an adjustment in gearing, the engine is turning more revs to make the truck go the same speed. Second, the 315/80R22.5 tire has a wider tread width so, all other things being equal, it may have a higher rolling resistance value. Third, if you went from a worn out tire to a new tire, the increased tread depth will create more rolling resistance than the worn out tire (again, with all other things being equal). As the new tire wears down, the rolling resistance will improve. Fourth, if the new tire is a completely different tire brand and/or tire type, there could be big differences in rolling resistance. A lug tire will have higher rolling resistance than a similar rib tire, for example. Also, yes, you could expect some of the same issues with the change from a 295/80R22.5 to a 315/80R22.5.
Towing a Prostar with Air Ride Front Suspension
Posted by John from Cheyenne, WY, US on September 9, 2009
I work for a towing company. And recently came across a 2009 prostar. The front axle was air ride with no baseplate or u-bolts. I need some info on towing this new air ride. Any information would be great.
John Beeman
E-mail Cpthokk@aol.com
Phone # 307-761-7004 24/7
http://www.hendrickson-intl.com/pdfs/Truck_PDFs/Steertek/Tp_258b.pdf
The website above explains the best way to tow a vehicle with this type suspension.
Tube type to tubeless 1
Posted by coleman from brighton, CO, US on August 30, 2009
What is the tubeless size for a 9.00x20
The diameter and overall width of the 9.00-20 is very close to the 10-22.5 tubeles tire. You need to check the load requirements to determine the load range you will need.
Proper Tire Pressure Method
Posted by Guy from Yuba City, CA, US on August 25, 2009
The issue of tire pressures seem to come up time and time again. The question is; are we suppose to use the tire pressure recommendations on the tire or the label on the door jamb? I drive fire trucks that are always loaded with equipment.
The loads and inflations shown on the sidewall of the tire are the maximum loads and inflation pressures when the tire is used as a single tire or as one tire in a dual configuration. The proper inflation pressure can only be determined if the axle loads are measured when the truck is fully loaded (divide the axle load by the number of tires/wheels on that axle). If you are not overloading the vehicle in any way, the inflation pressures shown on the placard are what you should do. If you are underloading the vehicle, it may be possible to lower the inflation presures to match the load.