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 > Your search for posts made by 'CapriRacer' found 23 matches.

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  Subject Author Date Posted Forum
RE: tire pressure

Once again, I am reminding people that those load/inflation pressure charts are MINIMUMS, NOT recommendations.
CapriRacer 08/21/22 07:42am Beginning RVing
RE: Tire pressures

The only time you may need to adjust tire pressures within the same day is if you experience a SEVERE change in temperature - downwards (colder). And severe means more than 30°.
CapriRacer 07/10/22 06:10am Class A Motorhomes
RE: 245’s on a 6 inch wheel?

Here's the math: If you start with 8R19.5's, they are supposed to be 8.0" wide on a 6.00 rim, with an overall diameter of 33.8", a minimum dual spacing of 9.1", and a load carrying capacity of 3525# at 110 psi for a Load Range F. A 225/70R19.5 is supposed to be 8.9" wide on a 6.75" rim, with an overall diameter of 31.9", a minimum dual spacing of 10.0", and a load carrying capacity of 3640# at 95 psi for a Load Range F. Assuming for the moment that you have 6.00 wide rims to start with, the 225/70R19.5 will be about 8.5" wide on that 6.00" rim. Since it is common for chassis manufacturers to specify minimum dual spacing rims, the net effect is that there will be a loss of about 1/2" space between the duals. I urge caution in this area. Also, the diameter change results in 6% change - which means the speedometer will read 60 mph when it is going 57 mph. And lastly the load. In order to carry the same load the 8R19.5 does at 110 psi, the 225/70R19.5 only needs 92 psi. So the real danger areas are the rim width (minimum 6.00" for a 225/70R19.5) and the dual spacing (9.6" for the 225/70R19.5 on a 6.00” rim) So to answer the question asked: Yes, those will likely fit on the front. It is unlikely that a 1/4 inch more width will rub against any bodywork or suspension parts. The real problem is the dual specing.
CapriRacer 07/09/22 06:08am Class A Motorhomes
RE: Can trailer tires be patched?

@bucky, how many plugged tires you had self destruct in a short time, or ever? I'm working on a 50% failure rate. Luckily the tires didn't fail - just the plugs!
CapriRacer 07/01/22 05:39am Travel Trailers
RE: Can trailer tires be patched?

Yeah, do not accept a "plug" as the higher pressure in ST tires tends to force the plug out.
CapriRacer 06/28/22 06:41am Travel Trailers
RE: E vs. D rated trailer tires

I see no one has mentioned that a Load Range E has the same load carrying capacity as a Load Range D when inflated to the same pressure. At the LR D pressure, a LR E performs the same - ride, sway, etc. So you can buy a LR E and use it in place of a LR D.Actually they have about 18% more capacity when inflated to the same pressure when comparing the 75R15(D) and 75R15(E). Endurance Load Chart ........ Ah .... Mmmmm ..... Not exactly. You compared an ST205/75R15 to a ST225/75R15. What is interesting is that the referenced chart doesn't show Load Ranges that Goodyear doesn't make, so you can't actually do an apples to apples comparison for those 2 sizes. (meaning you should be comparing an ST225/75R15 LR E to an ST225/75R15 LR D.) If you look at other charts, you'll see that principle in action.
CapriRacer 06/15/22 10:51am Tech Issues
RE: E vs. D rated trailer tires

I see no one has mentioned that a Load Range E has the same load carrying capacity as a Load Range D when inflated to the same pressure. At the LR D pressure, a LR E performs the same - ride, sway, etc. So you can buy a LR E and use it in place of a LR D.
CapriRacer 06/15/22 04:18am Tech Issues
RE: Tire Recall

OK, a couple of things: First, is that in the truck market, it's the buyer who specifies what tires are put on the vehicle - EXCEPT for vehicles not purposely built for customers. In those cases, it's the vehicle manufacturer who decides what tires go on. In this case, the chassis was a bus chassis, which is usually used for intercity bus service. That is start and stop type of service, which the tires were designed for. The problem was that RV converters bought those chassis's and didn't change the tires out for something more suitable for RV service. Ergo, I don't see how Goodyear was involved in the decision as to what tires were applied. Second, how is the chassis manufacturer or the RV converter not liable? Maybe they are, but they settled earlier to avoid the bad PR. Clearly Goodyear could have done a better job of handling this, but I just don't see this as a "defect". It's a "poor job of selecting tires" type of thing.
CapriRacer 06/09/22 06:07am General RVing Issues
RE: GY Recall

Wow, Goodyear is recalling 19 to 26 year old tires? I'll bet this is part of a settlement of a lawsuit. I can not imagine why they would to this otherwise.
CapriRacer 06/07/22 06:11am Class A Motorhomes
RE: Tire exploded in Florida

My first reaction was to ask how old the tires were, but I see in OP's profile that they have a 2020 Keystone trailer listed - so 2 to 3 years old. Second, we haven't ruled out a road hazard. A photo might help us here.
CapriRacer 06/04/22 05:36am General RVing Issues
RE: Trailer Legs

..... Not sure this nylon wrap would cause flat spotting. .... Yes, that is what I am referring to - and there are some circumstances where the tires will flatspot. It isn't a 100% thing. ...... My Providers never seemed to flat spot from sitting over Winter. I do add an extra 5 psi in late fall due to air loss from Winter temp extremes. I air to 70 psi, even though tire max is 65. I let back down to 65 when warm temps return. We do know the nylon tires of yesteryear did flat spot. Jerry Yes, that is what I am talking about. Adding that 5 psi would certainly help prevent the flatspotting. Plus, flatspots can be small enough not to be noticeable. (I'm sure that a flatspot that would lightly shake the stuff in a trailer's cabinets is not enough to be noticeable from the tow vehicle.
CapriRacer 03/29/22 06:27am Fifth-Wheels
RE: Tire Load/Inflation Calculation

There seems to be something everyone is missing. There ought to be a vehicle tire placard that lists the original tire size and the specified (by the vehicle manufacturer) pressure for that size. Since 2008, that placard should be located on the driver's side front corner (if a trailer), or on the driver's door frame if a motor vehicle. There are a lot of reasons why the vehicle manufacturer might use more than what the published load tables says is the minimum. Oh and the load tables are a MINIMUM, not a recommendation! And tires wearing uneven (as in the center of the tread). Tires can be designed to wear evenly at a variety of pressure/load combinations, so lowering the pressure to achieve even wear is not always a good idea. Plus pressure is a minor player when it comes to even wear. There are other factors that have a much larger affect.
CapriRacer 03/29/22 06:19am General RVing Issues
RE: Trailer Legs

To raise tires of the ground for long storage times. Why do you want to do that? Modern tires are fine sitting for long periods. No, they aren't! Many tires today have cap plies made of nylon. Nylon is VERY prone to flatspotting - and the longer they sit, the more likely the flatspots may be permanent.
CapriRacer 03/27/22 04:58am Fifth-Wheels
RE: trailer wheel weight rating/compared to tire psi rating?

..... I would like someone to explain whey they have weight inflation chart for the ENDURANCE if it's not ok to run tires pressures based on actual load. ...... Those are MINIMUMS, not recommendations. Sure but that is what the tire is designed to support at those pressures right? ..... Yes, but just barely. Not a good practice. .....Maybe you can elaborate. Do you disagree with GY tech support or agree that a person up sizing in load range can use the chart for the best ride, tire wear and stopping by adding 5psi to the chart. ..... I am merely saying that the tables are a minimum, not a recommendation and it looks like the GY tech support agrees with me. ...... Let's forget Jerry's rim pressure rating. If you went to the GY "E" 15" would you run the tires at 80psi or use the chart plus 5psi as GY Tech recommends? ..... I would need some additional information. Like year, make, and model of trailer. What does the vehicle manufacturer specify? Are actual weights available? In other words, the sort of thing a vehicle manufacturer would go through when they make their specification. Yes, we know that some trailer manufacturers didn't do a good job of specifying tires and pressures. Is Jerry's vehicle one of them? Do we have reason to disagree with their specification? These are all questions that I would need to make a recommendation. ..... Answer this. I am around 4,500# load on each tire and the GY "H" tires were not holding up running them at 125psi with a rating of 4,805#. Now I went with the Continental's with 6,005# rating at 125psi. Would you run 125 psi or lower pressure like 100 that gives 5,200# capacity? Why so argumentative? But to answer your question, see the above for how I would do it. Your question doesn't contain the information I would seek before giving an answer.
CapriRacer 03/19/22 06:59am Fifth-Wheels
RE: trailer wheel weight rating/compared to tire psi rating?

..... I would like someone to explain whey they have weight inflation chart for the ENDURANCE if it's not ok to run tires pressures based on actual load. ...... Those are MINIMUMS, not recommendations.
CapriRacer 03/18/22 07:33am Fifth-Wheels
RE: trailer wheel weight rating/compared to tire psi rating?

https://i.imgur.com/NqGMNM8l.jpg My 6-bolt wheels on 5200 lb axles with oem 225/75R 15 D-rated 2540 max wt tires. My wheels are steel and are marked 2,600 max weight. My FW GVWR is 12,110, which would mean 10K max on tires/wheels. I have a 4K CCC, so FW never loaded to GVWR. I am thinking not much more than 8,500 lbs on tires/wheels most times. I am planning to replace the tires this Spring. My first choice is GY Endurance 225/75R 15E with max rating 2,830 at 80 psi. I understand that at 65 psi, these tires would carry same 2540 as current D tires. My question is...if I inflate these new E-rated tires to 80 psi, giving the tires full load carrying capacity, will the wheels take that increase in pressure? I will replace the rubber stems, with 80 psi rated stems. Any of you heavy commercial haulers ever break a steel trailer wheel from a bit over listed max weight? Jerry I've been trying to answer that question for many years. I have yet to get a definitive answer. Why? 1) Because federal regulations do NOT require a max load and/or max pressure on wheels - only tires. This is likely because wheel failures are not very common. It appears that if your wheels are marked it is because of the manufacturer of the wheels - perhaps for legal liability reasons and not because of an actual stress limitation? 2) Every time I talk to a wheel designer, they say they design wheels according to the max load - and do NOT consider inflation pressure at all. But since this is always a one-on-one conversation, I don't consider this definitive. So the best information I have been able to dig up is that it OK to inflate your tires to more than the max pressure stamped on the wheels.
CapriRacer 03/15/22 06:39am Fifth-Wheels
RE: Trailer King Tires

1) To be sure you have enough load carrying capacity in the tires, you need to have individual tire weights because there is front/rear and side to side variation. IMHO, you need a 15% over capacity. It appears you barely have that. So I would suggest a test: Pressure buildup: You want no more than 10% - excluding the ambient temperature effect (2% for every 10°F). 2) Those tire load tables are MINIMUMS!! You want to be over that! Since tire wear is not an issue on a trailer, a bit of over inflation doesn't yield much in the way of penalties. 3) Wheels are not required to have max load or max pressure written on them (unlike tires!). That's probably because there isn't an issue with wheel failures. The best information I have gathered from wheel designers is that inflation pressure is not the issue with wheels, but load is.
CapriRacer 02/16/22 05:24am Toy Haulers
RE: Changing Tires

So here's the science behind the tire aging limit: Rubber compounds age according to temperature. It's called the Arrhenius equation. A quick and dirty version is: Chemical reactions double with every 10°C. What that means is that tires in - say - Phoenix age much more rapidly than tires in - say - Minneapolis. That's one of the reasons why there is disagreement between users. Then we have the issue of trailer tires. Many of these weren't designed well and failed early. This had little to do with aging and a lot to do with material fatigue. This is also influencing how people perceive tire life.
CapriRacer 01/26/22 07:11am Good Sam Club
RE: Michelin Cross Climate C Metric Tires

This is one of those quirky things. C type tires are a European based tire standard, where LT tires are a US based tire standard. Normally there is very little difference between European and US tire standards, but this is one of those exceptions. Michelin is not the only tire manufacturer making these kinds of tires, but they are hard to find. Even looking on Tire Rack's website doesn't bring them up on a size search.
CapriRacer 12/15/21 11:55pm Class C Motorhomes
RE: Max Pressure Cold vs Hot Pressures - How Much Is Too Much

I'm just curious.... if the chart is gospel, why go 5psi above what the chart recommends? Mike Actually, the chart is a MINIMUM! Even says so! (Load Limit)
CapriRacer 11/22/21 06:00am Fifth-Wheels
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