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Archive for July, 2006
Comparable Tire Size
Posted by Tim on July 20, 2006
We operate several off road support trucks. They have 11.00-20 bias non-directional tires. What is the closest high flotation tire that can we can put on the front axle (like a 425/65R22.5). Rolling radius is important, they are all wheel drive with an on road top speed of 55 MPH.
Without knowing what brand and type of tires you are currently running, I can only use a Tire and Rim Association book to determine what the new diameter of your current tires are...about 45 inches. With that in mind the comparable size in a wide base tire would be the 425/65R22.5 that you mention with the 445/65R22.5 size just a little taller (.25 - .50 more rolling radius).
Used Tires
Posted by Tim on July 18, 2006
Can tires be recycled? If what are some ways in which it can be recycled. Can tires be used with asphalt to increase the flexablity of roads? If so how?
This is a little out of my area of "expertise" but I will give it a try. The most common way tires are "recycled" is retreading. By taking a worn tire and grinding away the remaining tread to create a textured surface, a new tread can be applied. Of course, this is common in the trucking industry but not common for consumer tires. Other uses for old tires: in asphalt (as mentioned), ground into pellets to be used as fuel and bundled together to use as off-shore reefs.
Replacing Steer Tires after Alignment
Posted by Tim on July 14, 2006
Should we as a practice replace steer tires after an alignment? We are specifically questioning replacing steers with thick tread, but they have some uneven side wear. Some of this wear manifests in feathering or flat spotting of the outside or inside edge. Do you think that this type of wear will normally cause a front end vibration?
Some irregular wear conditions on tires can tend to get worse once they are started. The feathering you mentions might clean up after the alignment corrections are made but, the "flat spotting" might create front end vibration and get worse as miles are accumulated. It is probably a good idea to replace the tires in this case. The current tires would probably be OK as trailer tires or retread them as drive tires.
Tires Increase Axle Loads?
Posted by Tim on July 12, 2006
Do super single tires increase axle loads? If current steer axle load rating is 12000 lbs, does putting wide base tires on bring rating to 18000 lbs?
No. The steer axle of a vehicle has a rating based on the strength and durability of the components of the axle and the suspension. Tires are rated based on their size and the inflation pressure they are designed to carry. If the load capacity of the axle and tires do not match, the limiting factor is the one with the lowest rating.
International Governing Agency
Posted by Tim on July 11, 2006
I’m not sure who to pose this question to but I am trying to find out if there is an international highway governing agency of which perhaps that DOT is a member. So is there an agency that has a charter similar to the DOT here in the USA but who is governing agency for the world?
No one here at Goodyear seems know of any international orgainzation governing highways. It appears that our DOT and the equivlant organizations from other countries operate independently without any sort of umbrella over them. If anyone finds out differently, please let me know.