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Archive for April, 2006
Wider Replacement for an 8R19.5
Posted by Tim on April 23, 2006
Is there a wider replacement tire & wheel for a 8R19.5? This is for a 1985 Chev P30 chassis.
There are some wider tires available that fit a 19.5 rim. Specifically, the 225/70R19.5 and the 245/70R19.5. Whenever you consider changing tires sizes, you need to check that you are using a rim width that is allowable on the new tire size and that there are no clearance issues with the inner fender of the vehicle. Remember that any significant change in tire diameter will effect the gearing, also.
Class 8 Tractor Pulling a Camper
Posted by Tim on April 23, 2006
I have a Class 8 tractor that I only bob tail with or pull a 17500 lbs. camper with. I just put new 22.5 steers on. Now I am looking what to do on the rear tamdems with regard to fuel milage and ride. Options that I can think of are taller tires, single tires instead of dual, or both single taller tires. Still want to keep tandem axle. Truck specs are 60 series Detroit , 10 speed Eaton 373 rear axle ratio.
I don't think that taller tires are going to significantly improve your fuel economy. The wide base single tires potentially will improve fuel economy especially if you use aluminum wheels in place of steel rims but, unless you carry a spare, I would be concerned about getting replacement tires on-the-road. If your travels are along the US east coast, this may not be as much of a problem as traveling in the vast, wide open areas of the West.
Air Inflation Systems
Posted by Tim on April 12, 2006
I was looking for some input on the air inflation systems. I am running 2000 trailers with this system and have had a lot of trouble with control boxes and the seals in the lines going from thru to the valve stems. Are their fleets out there dealing with the same troubles and what are they doing to maintain this system?
As a tire guy, I like anything that keeps tires inflated. There are many large fleets going to these systems and they typically do not do so without careful study. If you are having problems with your inflation system, I can only urge you to get with the manufacturer of the system and find out where the problems are.
TVTRACK Software
Posted by Tim on April 11, 2006
We provide tyre maintenance services to city buses around the Bangkok area, Thailand and also to our own company’s city buses. We set up 20 depots to service more than 1,500 buses of these two fleets. As you know the nature of running city bus is “go and stop” all along the route. The heat generated by this nature may be one of those factors that cause damages to and shorten the using life of the tyres, tubes and flaps. We also do the retreading for all used tyres so we can reuse them until end of their life cycles. We are searching for some other methods to prolong the using period of tyres, tubes and flap.
It would be very much appreciated if you can provide us some more information as follows:
We have to keep record of all the using tyres in order to analyze their mileages and other factors. We have heard about Goodyear’s TVTRACK software. This software seems to provide a lot of tire data collections. How would we be able to get more detailed information on this program? How much does it cost?
TVTrack is a software program that allows you to imput tire/vehicle data. It will summarize the data by wheel position, brand, type, inflation pressure, etc. Over the years, many fleets have found it very useful to help manage the tires in the fleet and help make decisions from facts. To obtain this software, contact Mike Gilchrist at Goodyear either by calling 330 796 6543 or e-mail him at mjgilchrist@goodyear.com.
Steer Axle Tire?
Posted by Tim on April 9, 2006
I bought a brand new cutaway box chassis 17,500 GVW for my contracting business. I chose from the factory all season tires. The manufacturer put knobby traction tires on all six tires. (It is a dually of course) I am getting feathering in the front steering tires. Most places I have talked to have said regardless of tire choices there should be a different designed “steering tire” on the front. What is your opinion? I do local surburban and city driving with some highway driving and lots of turns.
You will notice that most commercial vehicles (working trucks) have "rib" type tires on the steer axles and trailer axles. The drive axle tires tend to be "lug" tread designs. While the lugs improve traction to get the vehicle going in wet or snow, rib tires give the truck traction while resisting irregular wear (like you have). Your information sources are correct.