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Showing results 1 to 50 of 243
Search took 0.03 seconds. Search: Posts Made By: jadatis
Forum: Tires 03-14-2024, 01:10 PM
Replies: 30
Views: 3,268
Posted By jadatis
General idea is to fil determined cold pressure...

General idea is to fil determined cold pressure at ambiënt temperature, be it 30 degr F or 110 degr F.

But this " pigheaded Dutch selfdeclared tyrepressure specialist" dont agree with that.

My...
Forum: Tires 03-14-2024, 02:26 AM
Replies: 30
Views: 3,268
Posted By jadatis
The 1835 lbs maxload of rimm is probably enaugh,...

The 1835 lbs maxload of rimm is probably enaugh, because its an Airstream TT.
But to be shure, I can calculate it for you, if you give GAWR's and GVWR.

And what tires are on them now, mayby even...
Forum: Tires 03-13-2024, 01:03 PM
Replies: 30
Views: 3,268
Posted By jadatis
The 80 psi is referencepressure of an E-load...

The 80 psi is referencepressure of an E-load tire, is often recomended for traveltrailers, because most brands have tires that are yust enaugh to law.

Airstream is the only exeption to the rule...
Forum: Tires 12-10-2023, 12:32 AM
Replies: 53
Views: 7,014
Posted By jadatis
The smaller ST sizes have mostly same...

The smaller ST sizes have mostly same maxload/loadindex as LT would have, but the larger sizes like 16 inch have 6 loadindex step higher then LT would have is 18% more maxload.
And that is because...
Forum: Tires 12-07-2023, 04:25 AM
Replies: 53
Views: 7,014
Posted By jadatis
I tought first that TT 's in US only where...

I tought first that TT 's in US only where allowed with ST tires, but this topic shows its more a strong recomendation in US.

Research in the Netherlands showed that tires pressure and choice...
Forum: Tires 12-06-2023, 09:25 AM
Replies: 53
Views: 7,014
Posted By jadatis
Nothing wrong with P-tires or the european...

Nothing wrong with P-tires or the european equivalent, if maxload is with comfortable reserve for gawr and gvwr.

So to see what loadindex/maxload you need you need the GVWR and GAWR's.
Mayby you...
Forum: Tires 11-29-2023, 09:57 AM
Replies: 14
Views: 2,297
Posted By jadatis
Read your topic from a month earlyer, with same...

Read your topic from a month earlyer, with same subject.
In that empty weight of 6700lbs, but need the GVWR and GAWR's for this. Or better real axleloads, even better real axle-end loads.
Also...
Forum: Tires 11-26-2023, 03:46 PM
Replies: 14
Views: 2,297
Posted By jadatis
Also a possibility, did not think of that. ...

Also a possibility, did not think of that.

If to narrow rimm, the treath is pulled bolled wich cant be solved with lower pressure.

But I assumed topicstarter did not change tiresize.
So...
Forum: Tires 11-26-2023, 11:22 AM
Replies: 14
Views: 2,297
Posted By jadatis
Do you have 2000 lbs GAWR or per tire. And I...

Do you have 2000 lbs GAWR or per tire.
And I concuded from 45 psi you have 225/75 R 15
Then I assume your OEM being D-load and later E-load placed. But help me out of the dream.
Forum: Tires 11-26-2023, 09:39 AM
Replies: 14
Views: 2,297
Posted By jadatis
Matby the OEM tires where C-load AT 50 psi, then...

Matby the OEM tires where C-load AT 50 psi, then my extra safe calculations come to about 55 psi.
And Airstreams often have comfortable reserves in OEM tires to the GAWR's and GVWR.


So if you...
Forum: Tires 05-27-2023, 04:18 AM
Replies: 80
Views: 11,266
Posted By jadatis
Answer to post #80 Someone began about...

Answer to post #80

Someone began about Nitrogen filling, and I tried, with writing about my spreadsheet, and the conclusions taken from the example, to shortcut the Nitrogen part in this topic....
Forum: Tires 05-23-2023, 05:38 AM
Replies: 80
Views: 11,266
Posted By jadatis
To late to edit last part corrected And this...

To late to edit last part corrected

And this is already filled at high humidity, when I fill in 50% humidity, more realistic, temp calculated 95 degrF then 70. 4 psi dry and 70. 9 psi wet pressure...
Forum: Tires 05-23-2023, 03:14 AM
Replies: 80
Views: 11,266
Posted By jadatis
The Nitrogen filling is here a little offtopic,...

The Nitrogen filling is here a little offtopic, but here my 2 cents.

Recently made a temperature/ tirepressure calculator spreadsheet, in wich new pressure for new given temp, and new temperature...
Forum: Tires 05-21-2023, 12:55 AM
Replies: 80
Views: 11,266
Posted By jadatis
And give tire specifications and GAWR and GVWR,...

And give tire specifications and GAWR and GVWR, and howmany axles, and let me calculate a highest pressure at wich your rivets wont pop.
Then if not only you are new but also the Airstream,...
Forum: Tires 05-20-2023, 07:49 AM
Replies: 80
Views: 11,266
Posted By jadatis
That axles together 7000lbs and GVWR 7300 lbs...

That axles together 7000lbs and GVWR 7300 lbs disapoints me a bit of Airstream. Often I state GAWR's together more then GVWR.

But still tires comfortable reserves to GAWR's and GVWR
The....
Forum: Tires 05-18-2023, 08:04 AM
Replies: 80
Views: 11,266
Posted By jadatis
I wonder why tiremakers still publish...

I wonder why tiremakers still publish pressure/loadcapacity lists for ST tires, If you have to keep them at maxloadpressure.

My opinion is also, that the lower pressure used was not the cource of...
Forum: Tires 05-14-2023, 12:13 PM
Replies: 21
Views: 3,514
Posted By jadatis
Already given, only cold filled front of TV axle...

Already given, only cold filled front of TV axle was not given.
Forum: Tires 05-14-2023, 09:42 AM
Replies: 21
Views: 3,514
Posted By jadatis
When filled at 65 degrF 75 psi, and rising to 90...

When filled at 65 degrF 75 psi, and rising to 90 psi, the temperature in tire will be between 140 and 150 degrF, depending on the amount of water in tire.
So, your tempreading giving 95 degr F,...
Forum: Tires 05-04-2023, 12:33 AM
Replies: 69
Views: 7,329
Posted By jadatis
Nice complete list you give, looks profesional. ...

Nice complete list you give, looks profesional.

But if that much weightdifference between the axles of TT suspects nose low.
Then this better be solved by trying to get the nose higher.
If...
Forum: Tires 05-03-2023, 09:41 AM
Replies: 69
Views: 7,329
Posted By jadatis
I would like to know your GVWR and GAWR's, so I...

I would like to know your GVWR and GAWR's, so I can calculate the needex pressure with my extra safe system, to see if 80 psi is enaugh in this case.
Better would be weighed axleloads fully loaded,...
Forum: Tires 03-12-2023, 12:32 AM
Replies: 52
Views: 5,500
Posted By jadatis
But " normal" cars had and have in general also...

But " normal" cars had and have in general also comfortable reserve in the tires, so by accident that went safe too if filled 15% below maxloadpressure.

And in those days P speedrated mostly for...
Forum: Shipping & Export/Import 03-09-2023, 09:03 AM
Replies: 13
Views: 1,425
Posted By jadatis
Then you forget that springs are already half way...

Then you forget that springs are already half way down under the TT, so only 5 inch to win.

Average tire deflects about 1 inch, so if you use half the pressure, about 3 to 4 inch deflection.
So...
Forum: Tires 03-09-2023, 06:58 AM
Replies: 52
Views: 5,500
Posted By jadatis
But since 1987 you probably only had Airstreams....

But since 1987 you probably only had Airstreams.
So by accident this was safe for your situation.

But if you would stepp to another brand, most likely with that 15% below maxloadpressure, in the...
Forum: Shipping & Export/Import 03-09-2023, 06:07 AM
Replies: 13
Views: 1,425
Posted By jadatis
I think the sidewals of your tires to be about 4...

I think the sidewals of your tires to be about 4 to 5 inch, even flat tires not enaugh.

Sometimes where the entrance of container is, a bit lower, and you have to drive it in.
Forum: Tires 03-09-2023, 04:24 AM
Replies: 52
Views: 5,500
Posted By jadatis
Reaction to post #40. Inflating (cold) to...

Reaction to post #40.

Inflating (cold) to 15% below maxloadpressure as general rule, goes wrong for most other TT brands then Airstream.
This because they have mostly,:
1. Yust enaugh GAWR('s)...
Forum: Hitches, Couplers & Balls 03-08-2023, 02:46 PM
Replies: 18
Views: 1,968
Posted By jadatis
If you want a relatively easy way to yudge the...

If you want a relatively easy way to yudge the weightdivision over the tires, you can do it by measuring and comparing the deflection.

Roughly you can say that if fi 10% more weight on a tire, so...
Forum: Hitches, Couplers & Balls 03-08-2023, 01:10 PM
Replies: 18
Views: 1,968
Posted By jadatis
I will concentrate for now on different psi for...

I will concentrate for now on different psi for the axles, as you suggest.

Single axle trayler is easy, static balance.
But Tandemaxle is much more complicated because of dynamic balance.
If...
Forum: Tires 03-02-2023, 01:07 PM
Replies: 52
Views: 5,500
Posted By jadatis
I mean to remember that you, Gypsydad, also use...

I mean to remember that you, Gypsydad, also use about 58 psi on a E-load ( AT 80 psi) ST tire, and that is about what I calculated once for your configuration.

In Europe ST is not used on TT,...
Forum: Tires 03-02-2023, 03:02 AM
Replies: 52
Views: 5,500
Posted By jadatis
I wrote it before. Airstream TT's have as...

I wrote it before.
Airstream TT's have as exeption to the rule,
1.often comfortable reserves in GAWR('s) to the GVWR, and
2. comfortable reserves in the tires to the GAWR.

So even a C-load...
Forum: Tires 02-27-2023, 12:12 PM
Replies: 52
Views: 5,500
Posted By jadatis
I calculated that 62psi would be right for the...

I calculated that 62psi would be right for the 4160lbs axleload. Assuming your Endurance 2830 lbs AT 80 psi.
So 65 psi should not give centrewear.
But did you measure the sides close to the edge...
Forum: Tires 02-01-2023, 09:02 AM
Replies: 110
Views: 14,254
Posted By jadatis
Then I repeat what TM9 wrote in post #91. in...

Then I repeat what TM9 wrote in post #91.

in 2017 the RVIA added a requirement that the Certification sticker show an inflation sufficient to support 90% of the GAWR. This in response to the DOT...
Forum: Tires 01-27-2023, 11:34 AM
Replies: 110
Views: 14,254
Posted By jadatis
Then I repeat my question wich started the...

Then I repeat my question wich started the reactions after it
Would like a reaction from TM9 to clear the air.
Forum: Tires 01-27-2023, 03:58 AM
Replies: 110
Views: 14,254
Posted By jadatis
I only repeated what was written in this topic...

I only repeated what was written in this topic about it, so you have to ask the others.

#91 TM9 wrote about the pressure for 90% of GAWR.
#96 Richard 5933 wrote about the 10% reserve required...
Forum: Tires 01-27-2023, 12:11 AM
Replies: 110
Views: 14,254
Posted By jadatis
Tires 10% reserve capacity above GAWR, but giving...

Tires 10% reserve capacity above GAWR, but giving recomended pressure for 90% of GAWR, is not logical. Then you undo the needed reserve.
That is why I think its written down some wrong way around....
Forum: Tires 01-26-2023, 01:59 PM
Replies: 110
Views: 14,254
Posted By jadatis
In that Airstreams are an exception to the rule. ...

In that Airstreams are an exception to the rule.
Often comfortable reserve in GAWR's to the GVWR.
Other TT brands often GAWR(s) together 90% of GVWR. So even when 50/50 weightdivision on the axle,...
Forum: Tires 01-26-2023, 10:23 AM
Replies: 110
Views: 14,254
Posted By jadatis
TM9 wrote next:. In 2017 the RVIA added a...

TM9 wrote next:.

In 2017 the RVIA added a requirement that the Certification sticker show an inflation sufficient to support 90% of the GAWR.

I think a misthinking at that moment
It would mean...
Forum: Tires 01-25-2023, 09:27 AM
Replies: 110
Views: 14,254
Posted By jadatis
That P-tires must be for actuall axleload + 10%...

That P-tires must be for actuall axleload + 10% on SUV and light-truck, is to my opinion, because lighttrucs and SUV often have weightdifference R/L on the axle, and normal cars not that much.

In...
Forum: Tires 01-25-2023, 06:09 AM
Replies: 110
Views: 14,254
Posted By jadatis
Its sooner the other way around, ST needs more...

Its sooner the other way around, ST needs more reserve then an LT-, C- or P-tire ( etzetera)
This because ST is given maxload for 65mph ( yes also the Endurance with N speedrating for 87mph), and...
Forum: Towing, Tow Vehicles & Hitches 01-08-2023, 01:22 AM
Replies: 41
Views: 5,919
Posted By jadatis
D- load was a miswriting, sorry. But when I...

D- load was a miswriting, sorry.

But when I compare old list for Goodyear and new list for the Endurance, in the same sises the new is yust an expansion of the old list.
And that old list was...
Forum: Towing, Tow Vehicles & Hitches 01-07-2023, 01:08 AM
Replies: 41
Views: 5,919
Posted By jadatis
[ The only remaining question is should I be...

[

The only remaining question is should I be concerned about the added load of the Airstream? For example, should I be going to a CAT scale and using those values in the chart while...
Forum: Towing, Tow Vehicles & Hitches 01-06-2023, 04:06 PM
Replies: 41
Views: 5,919
Posted By jadatis
Johnbottoms now has enaugh information for his...

Johnbottoms now has enaugh information for his towing vehicle, so we can allow to go offtopic with ST.

Most other TT brands have poor reserve in tires to the axle, and then for max 65mph.
...
Forum: Towing, Tow Vehicles & Hitches 01-06-2023, 02:16 PM
Replies: 41
Views: 5,919
Posted By jadatis
Then an example, the 235/85 R16. In pressure...

Then an example, the 235/85 R16.
In pressure loadcapacity pdf of Goodyear given in ST and LT.

ST LI 132/ maxload 4400lbs AT 110psi = G load.
In that list at 80 psi given (D) 3640lbs...
Forum: Towing, Tow Vehicles & Hitches 01-06-2023, 10:19 AM
Replies: 41
Views: 5,919
Posted By jadatis
My opinion is to give ST a reserve of even 25 to...

My opinion is to give ST a reserve of even 25 to 30%, and LT or C can do with 10%+, so the other way around.

This because ST in the larger sises is calculated for 65mph in maxload, and so has...
Forum: Towing, Tow Vehicles & Hitches 01-04-2023, 09:45 AM
Replies: 41
Views: 5,919
Posted By jadatis
Thanks for looking again. But confusing for me,...

Thanks for looking again.
But confusing for me, because exactly the same written, and on the same place, as on the pictures I gave.
Forum: Towing, Tow Vehicles & Hitches 01-03-2023, 03:30 PM
Replies: 41
Views: 5,919
Posted By jadatis
Do they write exactly " max inflation pressure"...

Do they write exactly " max inflation pressure" or only max pressure or something.
If so, difference in EUR and US.

And that eventual TMPS is getting confused, is a secundary problem, but can be...
Forum: Towing, Tow Vehicles & Hitches 01-03-2023, 09:44 AM
Replies: 41
Views: 5,919
Posted By jadatis
In Europe Continental groop tyres give often "...

In Europe Continental groop tyres give often " maximum inflation pressure of 10 psi higher then the reference-pressure, so would be 90 psi.
Mostly given behind the maxload story, in your picture at...
Forum: Towing, Tow Vehicles & Hitches 01-03-2023, 07:27 AM
Replies: 41
Views: 5,919
Posted By jadatis
OK then, now we have all the information we need....

OK then, now we have all the information we need.

First, I putted the rimmwidth given of 8.5 inch in my made calculator, gave snallest tirewidth 235/65 allowed, ideal 285/65and widest allowed...
Forum: Towing, Tow Vehicles & Hitches 01-01-2023, 11:12 AM
Replies: 41
Views: 5,919
Posted By jadatis
I assume your OEM tires where also 275/65 R18, S...

I assume your OEM tires where also 275/65 R18, S speedrated, and googled your LT to be loadindex 123 for singleload axle.
Is 3417 lbs AT 80 psi for up to 160kmph/99mph.
The LT I found had also S...
Forum: Tires 12-27-2022, 10:03 AM
Replies: 53
Views: 8,455
Posted By jadatis
That failure of tires peak at 2 to 3 years, and...

That failure of tires peak at 2 to 3 years, and after that failure rate goes down, must mean something.

My idea is a tire holds up 3 years, it means that those tires are taken care of right, and...
Forum: Tires 12-25-2022, 02:27 PM
Replies: 32
Views: 4,080
Posted By jadatis
Often the agillis crossclate is E-load AT 80psi (...

Often the agillis crossclate is E-load AT 80psi ( or 75psi, 77psi or 83psi), while the old where D - or even C-load. Then higher pressure needed for the same load
.
So, once you have new tires,...
Showing results 1 to 50 of 243
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