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Search TiresQ/A ArchivesSeptember 2008
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Tim Miller 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»»
295/75R22.5 Tires in place of 11R22.5 tires Can a 295/75R22.5 be used in place of a 11R22.5? I would be changing both steer tires…both tires are LR-H. If you change only the steer tires to the LP22.5 size, you will be lowering the front of the truck about a half inch. I can't imagine that this would have any negative affects.
295/75R22.5 vs 11R24.4, which gets better fuel mileage I’m ordering a new truck and when specking tire size which size (should) get better fuel mileage? Tire size makes no differrence to my fleet, but will have to recalculate the rest of the drive train specs. All other things being equal, the 295/75R22.5 size should give you better mileage. This is mainly do to the fact that it will make the vehicle closer to the road which is better for aerodyamics and the better for fuel economy. Also, we offer the Goodyear Fuel Max tire line in this size (G395 LHS for steer, G305 LHD for drive and G316 LHTfor trailer) and this will result in even better fuel economy for you.
switching 22.5 to 24.5 & fuel economy My Fld120 came with michlin XDA-HT 22.5 tires, 3:90 ratio13 speed .73 ratio.It was ruuning 62 mph @ 1500 rpm, I had them changed to bf goodrich DR444 24.5 now it’s running 62 miles @ 1400 rpm.I was hoping for better mpg, but with the same load,route,speed,weather the new mpg got worse from 6.8 / 7 mpg to 6.35 / 6.5 mpg, Can you explain why.thanks. Many people make tire changes expecting positive results but forget that new tires with full tread depth will have higher rolling resistance than older tires that are nearly worn out. This could be your issue. Also, it is very difficult to have conditions really be equal in a real world situation. It is difficult enough in a true test situation.
1978 A class motorhome I have a 1978 28 foot A class motorhome the tire size is 8R17.5 I am having troubles on finding tires for it, it has the dually system so i have a total of 6 tires, the ones that it has on it now is a treaded tire, not aggressive but has the treads similar to a car, I found some rib style tires for it for a good price (new) and I am wandering what the difference the ride will give me if i go to the ribbed style. I only drive maybe 600 miles a year and only in spring and summer. I dont use it in snow and as minimal mud as possible, but i do go through gravel frequently with it. With the small amount of driving i do i dont really want to spend 1500 dollars on new tires and the ribbed style is about half the price. also i was told the ribbed style rides real rough. I was wandering also if that was true. Thankyou The primary difference between a "rib" tire and a "lug" tire is the ability of the lug tire to provide better traction in mud or snow. A rib tire in all axle positions should be fine if you drive manly in the spring and summer and don't need winter driving traction. There would not be a significant difference in ride but the rib tires would be somewaht quieter on the highway.
Trailer Tires on Powered Vehicles We have a 30 ft fifth wheel trailer and need to know if it is safe to put 215/85R16 road range E tires on it. Why can’t trailer tires be used on powered vehicles….. Is it because of the stiffness of the sidewall or something else. I can't speak for every tire manufacturer but, for Goodyear, all our tires of similar size have very similar casings, the basic structure of the tire. A trailer tire has a tread design that works well for free rolling, non-steering wheel positions. This means it typically has a shallow, rib-type tread design. Using this tire on a steer or drive position of a powered vehicle would not create an unsafe situation but, wet and winter traction might be something less than with a tire designed for steer or drive axles. |
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