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Search TiresQ/A ArchivesJuly 2006
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Archive for July, 2006
Tire Specs Where can I find tire specs like rolling diameter and original tread depth for the G-159 in LT235/85R16 LR-E? What current Goodyear tire is most like this tire, so I can put one of each on duals if necessary? The tread depth of this tire is 15/32nds and the diameter is 30.7 inches. Our G149 RSA is the replacement tire for the G159.
Dedicated Valve Stems What are the possibilities of installing an additional valve-stem on the other side of a wheel rim, so that it would only be seen when under the vehicle, or on the rack? This would be to provide a “dedicated” valve to accommodate a wireless pressure sensor/monitor. If properly installed, and there is adaquate brake clearence, I don't know of any reason that a second valve could not be installed on a wheel.
What tire should my bus use? For a 1993 Thomas flat nose school bus, I need two front steers 11R22.5 and 4 - 11R22.5 rears. Should I put recaps on? If so should I go with a series or b series? I was quoted $25.00 different in each tire. The b with double layer rubber is cheaper than a. Retread would work great on the rear of your bus. I am not sure what you mean by a series and b series but, some of my expert friends here think you may mean a virgin casing vs one that has already had one retread. If this is what you mean, I suppose I would suggest a retread on virgin casing. It could also depend on the planned usage of the bus. If you are taking long trips with it, I'd spend the extra $25. If it is just for local trips, a second retread on a quality casing should be fine.
Tire Temperatures A lot of people are using infrared thermometers to check tire and bearings these days and are concerned about what temps the tires should be after driving some distance. I know there’s a tremendous variability depending on inflation, speed, road temperature, ambient temperature, etc., but is there a temperature that indicates excessive stress or potential tire damage? During the manufacturing process, tires are cured in mold typically at temperatures above 230 degrees F. Engineers working with tires in all types of applications from mining tires to racing tires usually get conserned when they see temperatures in the casing (measured with probes)at or above the curing temperature. If the internal components of the tire get to these temperatures, the components that have been knitted together at these temperatures may begin to come appart. The problem with infrared thermometers is that they measure temperature at the surface only.
Tire Size on F250 I just bought a used 2002 F250 Diesel Superduty Crew Cab (4 doors) Short Bed truck which came with the standard 265/75R16 tires. I like the look of the 285’s alot better and it is time to replace the tires. How will my fuel economy be effected, if at all, by changing to the 285/75R16’s? There is not a simple answer to your question. My best guess is that it will make very little difference. If everything else is comparable, the extra width of the 285 will mean worse fuel mileage but the 285 is taller which would help fuel economy. The tires you are removing are worn so, they are at the point in their treadlife where they deliver the lowest rolling resistance and best fuel economy. New tires will have maximum tread depth, which is when tires are at the worst stage of their rolling resistance life. On top of all that is the potential to change tire brands or tire types within a brand which means the tread compound and construction of the tires will be different and have different rolling resistance. Confusing, right? |
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