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Archive for May, 2006
Tire Inflation
Posted by Tim on May 10, 2006
On a fire apparatus ladder truck, front axle wieghs 19240#. The tire is a Goodyear, G286-425/65R22.5 (LR/L). Currently we are maintaining 105psi. Could we safly lower to 95 to 100 psi?
According to the load / inflation tables for this tire size, you may safely lower your inflation pressure to 100 PSI assuming the load is equally distributed between the two tires on the steer axle. At 100 PSI, this tire will carry 9790 lbs of load.
WEAR PATTERNS
Posted by Tim on May 10, 2006
I read an article that described wear patterns and probable causes and solutions. I can’t remember where I saw it and would like to have a source of similar information. Any suggestions; website recommendations?
By far, the best information on tire wear patterns is found in the ATA's Technology and Maintenance Council (TMC) "Radial Tire Conditions Guide" available from the TMC website as follow: http://www.truckline.com/aboutata/councils/tmc
Super Single Tires
Posted by Tim on May 4, 2006
I work for a car hauling company and we get horrible MPG, the savings we could get by increasing our MPG just a few % points is incredible. I was considering the super singles because of the fuel savings they provide but did not know about the practicality and cost to switch our fleet over. We have to run low profile 19.5in tires and our trucks are on only 5 1/4 inches off the ground. Your thoughts?
Wide base tires may be an beneficial for many segments of the trucking industry but I am not sure that car hauling is one of them. If you are currently running 19.5 tires, I doubt that there are wide base tires available that would not drastically alter the ride height of your trailer. Plus, unless you are using enclosed haulers, the aerodynamic drag of the open hauler is what is hurting your fuel economy. Low rolling resistance tires would not helo your MPG as much as a "slippery" trailer like a tanker.