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Search: Posts Made By: jadatis
Forum: Winnebago Class A Motorhomes 01-13-2024, 12:19 AM
Replies: 18
Views: 1,400
Posted By jadatis
I calculated for 65 and 75 degr F ambiënt...

I calculated for 65 and 75 degr F ambiënt temperature at home of TS and the service centre, because TS did not give what temperature outside.
And so concluded that the first easy rule of tumb...
Forum: Winnebago Class A Motorhomes 01-12-2024, 03:58 PM
Replies: 18
Views: 1,400
Posted By jadatis
In my post #12 I forgot to calculate with...

In my post #12 I forgot to calculate with absolute pressure instead of gauge-pressure.
Luckyli the difference is small at these high pressures.
I calculated with my made calculator using 65 and 75...
Forum: Winnebago Class A Motorhomes 01-11-2024, 02:25 PM
Replies: 18
Views: 1,400
Posted By jadatis
100 psi rising to 110 psi is easy calculating,...

100 psi rising to 110 psi is easy calculating, rises 10%.
The gascompound in tire reaches such a temperature that pressure rises 10%

Not important what ambiënt temperature was, as long as its...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 01-07-2024, 04:24 PM
Replies: 9
Views: 860
Posted By jadatis
Most traveltrailer brands have tires with yust...

Most traveltrailer brands have tires with yust enaugh maxload to cover the GAWR, and Gawr('s) yust ensugh to cover GVWR minus towbarweight of minimum 10% in US.

Then the tires need the pressure...
Forum: Winnebago Travel Trailers 07-14-2023, 12:43 AM
Replies: 24
Views: 2,073
Posted By jadatis
If you are changing wdh settings or replacing...

If you are changing wdh settings or replacing heavy stuff to get more balance, you could roughly compare the weigt on wheels by measuring before and after the change, the deflection of the tires.
...
Forum: Winnebago Travel Trailers 05-18-2023, 05:05 AM
Replies: 24
Views: 2,073
Posted By jadatis
This information shows a reasonable reserve in...

This information shows a reasonable reserve in the GAWR's to the GVWR, the 2x3500lbs axles can carry the complete GVWR, and minimum is 10% on towbar.

And a reasonable reserve in the tires to the...
Forum: Winnebago Travel Trailers 05-14-2023, 12:02 PM
Replies: 12
Views: 996
Posted By jadatis
I calculated the tongeweight from trailerweight...

I calculated the tongeweight from trailerweight minus weight on trailer axles, and came to 1020 lbs. The 720 lbs given, is what rearaxle of TV becomes more.
And that also front axle gains weight...
Forum: Winnebago Travel Trailers 05-14-2023, 05:24 AM
Replies: 12
Views: 996
Posted By jadatis
I come to a tongeweight of 1020 lbs. Thats a...

I come to a tongeweight of 1020 lbs.
Thats a "bit" more then 576 you give as max allowed.
Forum: Winnebago Travel Trailers 05-13-2023, 05:54 AM
Replies: 46
Views: 2,629
Posted By jadatis
I made a pressure/temperature calculator, wich...

I made a pressure/temperature calculator, wich also gives for if enaugh water in tire to go over to gas. I think I am the first in that.

If you want to play with it, mail me at my hotmail. com...
Forum: Winnebago Travel Trailers 05-13-2023, 12:51 AM
Replies: 24
Views: 2,073
Posted By jadatis
Cant edit anymore, so additional here. Want to...

Cant edit anymore, so additional here.
Want to leave it at this for the pressure part, so this catscale topic dont go offtopic and chanches into a pressure topic.
Forum: Winnebago Travel Trailers 05-12-2023, 01:36 PM
Replies: 24
Views: 2,073
Posted By jadatis
Answer to post #10 Some specialists write...

Answer to post #10

Some specialists write that you must weigh per axle-end, and that is always better, but axleloads can do, to my opinion.
But that is why I mentioned it if possible.
So mostly...
Forum: Winnebago Travel Trailers 05-11-2023, 05:04 AM
Replies: 24
Views: 2,073
Posted By jadatis
Mostly weighing is done for determining needed...

Mostly weighing is done for determining needed tirepressure.
Better would be weighing per axle-end, but this will do. If you can drive next time with one side over the scales ( if possible) its...
Forum: Winnebago Travel Trailers 07-06-2022, 03:29 PM
Replies: 57
Views: 6,715
Posted By jadatis
When does your TMPS begins giving psi and...

When does your TMPS begins giving psi and temperature?
Most shut down when standing, and start up when driving.
But the temperature reading of external sensors is not reliable, because gives temp...
Forum: Winnebago Travel Trailers 07-06-2022, 03:19 PM
Replies: 57
Views: 6,715
Posted By jadatis
I dont see what I am making it complicated. ...

I dont see what I am making it complicated.
Yust making it as simple as possible.
If you understand the system, you dont do wrong things, like bleading air from a warm tire., for instance.
Forum: Winnebago Travel Trailers 07-06-2022, 12:40 PM
Replies: 57
Views: 6,715
Posted By jadatis
You show that you understand how to calculate...

You show that you understand how to calculate with my list.
26 degrF temperature rising/ 6.5 degrF= 4 psi.

But in practice in your example you measure a 4 psi higher pressure, and calculate from...
Forum: Winnebago Travel Trailers 07-06-2022, 05:52 AM
Replies: 57
Views: 6,715
Posted By jadatis
Dont maniacally change pressure every trip. ...

Dont maniacally change pressure every trip.
Checking is OK, but yust let it change with temperature in tire. Even if goes cold above the reference-pressure belonging to the loadrange.

And...
Forum: Winnebago Travel Trailers 07-05-2022, 12:58 PM
Replies: 57
Views: 6,715
Posted By jadatis
On the Airstream-forum, I discovered that...

On the Airstream-forum, I discovered that Airstream TT s have in any case for the tandem axle, 1st. Comfortable reserve in GAWR to the GVWR, and 2nd, comfortable reserve in the tires for the GAWR 's,...
Forum: Winnebago Travel Trailers 07-03-2022, 01:08 AM
Replies: 57
Views: 6,715
Posted By jadatis
First a little correction. If you have less then...

First a little correction. If you have less then 3700lbs on the axle, still some bumping to my determined standards.

But lets assume 3700lbs exactly 100% acurate determined.

Then the question...
Forum: Winnebago Travel Trailers 07-01-2022, 08:01 AM
Replies: 57
Views: 6,715
Posted By jadatis
Together with the GAWR 2 times of 3700lbs, i trew...

Together with the GAWR 2 times of 3700lbs, i trew this in my calculator, and lowered the maxload of 2830lbs by 6 Loadindex steps to give the tires a deflection an LT tire of that sise would need. ...
Forum: Winnebago Travel Trailers 04-23-2022, 12:19 AM
Replies: 57
Views: 6,715
Posted By jadatis
But not all the tire-specialsts that are needed...

But not all the tire-specialsts that are needed to check all the tires yearly, have that 40 years experiënce. So the methods have to be learned in a weak or so, to get enaugh profesional checking...
Forum: Winnebago Travel Trailers 04-21-2022, 03:34 PM
Replies: 57
Views: 6,715
Posted By jadatis
Speedrating is not only for the speed you drive...

Speedrating is not only for the speed you drive important.
Maximum load of a tire, is determined for reference-speed and -pressure.

Below Q speedrating reference-speed is mostly max speed ....
Forum: Winnebago Travel Trailers 04-15-2022, 01:48 PM
Replies: 57
Views: 6,715
Posted By jadatis
Those cavity's on 2nd picture you wont see on...

Those cavity's on 2nd picture you wont see on the outside, but would you hear difference in sound , when hammering the treath with a hammer?

Once saw that on TV, was done to check if tires could...
Forum: Winnebago Travel Trailers 04-15-2022, 12:12 AM
Replies: 57
Views: 6,715
Posted By jadatis
The pressure/ loadcapacity list of Endurance is...

The pressure/ loadcapacity list of Endurance is yust an expantion of the old list, as far as same sises. And because maxload is related to maximum speed, this made me conclude that though max speed...
Forum: Winnebago Travel Trailers 04-14-2022, 03:02 AM
Replies: 57
Views: 6,715
Posted By jadatis
LT tires maxload is given for max speed of...

LT tires maxload is given for max speed of 160kmph/99mph, ST for 65mph.
So if LT of same sise in higher loadrange has same maxload, you are doing better.

This because the 99mph max speed of...
Forum: Winnebago Class C Motorhomes 03-07-2022, 01:18 AM
Replies: 11
Views: 4,349
Posted By jadatis
I would like to know how you TM9 as respected...

I would like to know how you TM9 as respected tire-specialist , manages the tires on your motorhome. And what your experiënces are with comfort and riding quality.

You write even 20% reserve....
Forum: Winnebago General Discussions 08-31-2021, 04:25 AM
Replies: 12
Views: 1,545
Posted By jadatis
Reaction to post #12 above. Better is to let...

Reaction to post #12 above.

Better is to let me calculate the needed pressure for you. American pressure/loadcapacity lists lead to to low pressure, I use an even safer formula then the...
Forum: Winnebago General Discussions 08-30-2021, 12:26 AM
Replies: 12
Views: 1,545
Posted By jadatis
Mayby the manufacturer made it deliberetly a bit...

Mayby the manufacturer made it deliberetly a bit difficult to find, because the smaller motorhomes often have to small payload.
Also GAWR rear is soon overloaded for the smaller motorhome. Even if...
Forum: Winnebago General Discussions 08-29-2021, 04:22 PM
Replies: 12
Views: 1,545
Posted By jadatis
In the Netherlands, where I live, we pay taxes by...

In the Netherlands, where I live, we pay taxes by the empty weigt of vehicle. So empty weight is known. Also GVWR is known, so payload is GVWR minus empty weight. Mayby your empty weight is also...
Forum: Winnebago Travel Trailers 04-29-2021, 02:08 PM
Replies: 25
Views: 2,940
Posted By jadatis
If the maxload is for 99mph is enaugh for GAWR...

If the maxload is for 99mph is enaugh for GAWR +11% , even a P-tire is enaugh, and those are better for the real offroad .

An ST needs 30% reserve to GAWR to give maximum reserve without bumping....
Forum: Winnebago Travel Trailers 04-28-2021, 04:46 AM
Replies: 25
Views: 2,940
Posted By jadatis
Answer to above post #23. I know they are...

Answer to above post #23.

I know they are given maxload 2340 AT 50 psi, and max speed 75mph. But ST maxload is always calculated for 65mph.
That Is why I lowered it by 6 LI steps , to give it...
Forum: Winnebago Travel Trailers 04-27-2021, 03:15 PM
Replies: 25
Views: 2,940
Posted By jadatis
Then the ST must be smaller sise then the XL,...

Then the ST must be smaller sise then the XL, because only 1 LI step more, while going from 44psi( or even 41psi) to 50 psi. Expected 2 li steps higher in same sise 275/75R15 and even because of...
Forum: Winnebago Travel Trailers 04-27-2021, 01:25 AM
Replies: 25
Views: 2,940
Posted By jadatis
Answer to above post #18. I also expected...

Answer to above post #18.

I also expected P-tires but are they XL/extraload/reinforced, or even yust Standard load.

SL AT 35/36 psi and XL// AT 41/42 psi, but sometimes 44psi.
If SL they...
Forum: Winnebago Travel Trailers 04-26-2021, 04:42 AM
Replies: 25
Views: 2,940
Posted By jadatis
That your tire where from Vietnam, not...

That your tire where from Vietnam, not automatically make them bad.

I live in the Netherlands Europe, and here many lightweigt TT ( 1000kg to 2200kg , 4400lbs to 4800 lbs) provided with up to...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 03-08-2021, 02:32 AM
Replies: 6
Views: 3,430
Posted By jadatis
Often it is needed to use the max given on...

Often it is needed to use the max given on sidewall of tire, but not always.
ST list of Goodyear and others give yust enaufh pressure to ride 65mph and no reserve to the load.
So its best , if you...
Forum: Winnebago Class B Motorhomes 02-11-2021, 04:43 AM
Replies: 26
Views: 6,455
Posted By jadatis
Other explanation is , that your wife and dog are...

Other explanation is , that your wife and dog are seated behind the rear axle, then the ride is also wilder, and not tire-related.

How did your dog let you know the ride was bumpy? ;)
Forum: Winnebago Class B Motorhomes 02-11-2021, 01:09 AM
Replies: 26
Views: 6,455
Posted By jadatis
When I use my made...

When I use my made motorhome-tirepressure-calculator, it ads first 10% to the given axleload for reserve.
If you use the 5291 lbs GAWR you gave, it would mean 5820 lbs for wich my spreadsheet...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 01-18-2021, 02:23 AM
Replies: 16
Views: 1,999
Posted By jadatis
Yes, only dropp te pressure after weighing fully...

Yes, only dropp te pressure after weighing fully loaded, as you go on tripp. Best per axle-end, second best per axle.

Then for a motorhome in the European situation, the front often can be dropped...
Forum: Winnebago Class A Motorhomes 12-21-2020, 12:45 AM
Replies: 17
Views: 1,365
Posted By jadatis
Mayby your tires could have done with lower...

Mayby your tires could have done with lower pressure safely to, and this gives a more comfortable ride.

I am able to calculate a pressure with maximum reserve, but still acceptable comfort and...
Forum: Winnebago Travel Trailers 09-29-2020, 09:46 AM
Replies: 20
Views: 4,427
Posted By jadatis
The prescribed pressure of TT maker, is also not...

The prescribed pressure of TT maker, is also not based on real weights on seperate tires in use.
Sometimes calculated simply for GAWR's , and here even for assumed real axleweights, with no reserve...
Forum: Winnebago Travel Trailers 09-29-2020, 06:16 AM
Replies: 20
Views: 4,427
Posted By jadatis
I dont see what I am doing wrong in this topic. ...

I dont see what I am doing wrong in this topic.
I advice for the D-load , topic-starter has, 67 psi, and even warn that only 65 psi is allowed.



Because TS gave that OEM tires where C-load, I...
Forum: Winnebago Travel Trailers 09-28-2020, 01:48 PM
Replies: 20
Views: 4,427
Posted By jadatis
Because I saw that your OEM tires where C load, I...

Because I saw that your OEM tires where C load, I also putted those data in my calculator.
So 1760 lbs AT 50 psi.
Gave 59 psi , can dropp to 49 psi for 65mph.
Then still reserve for unequall load...
Forum: Winnebago Travel Trailers 09-28-2020, 11:46 AM
Replies: 20
Views: 4,427
Posted By jadatis
When you use a WDH , a bit more weight on the...

When you use a WDH , a bit more weight on the axles of TT, so higher pressure is needed.
And my advice is based on 10% of total weight, so 700 lbs on towbar.
Also no overloading.
Forum: Winnebago Travel Trailers 09-28-2020, 05:47 AM
Replies: 20
Views: 4,427
Posted By jadatis
Then 205/75R14 ST 2040 lbs AT 65 psi upto 65mph ...

Then 205/75R14 ST 2040 lbs AT 65 psi upto 65mph
2 axles 3705 lbs GAWR GVWR 7000 LBS.
Then my calc comes to 67 psi , can drop to 56 psi. You must see this as minimum. So keep them on 65 psi.
Forum: Winnebago Travel Trailers 09-28-2020, 02:46 AM
Replies: 20
Views: 4,427
Posted By jadatis
Best is weighing per axle-end fully loaded as you...

Best is weighing per axle-end fully loaded as you are going on trip. But in lack of that give GVWR, GAWR's and howmany axles, and the tire-specifications, and I will calclate a highest pressure with...
Forum: Winnebago Class A Motorhomes 05-07-2020, 02:15 AM
Replies: 15
Views: 5,239
Posted By jadatis
Why should you change after 6 years, tiremaker...

Why should you change after 6 years, tiremaker Michelin advices to preventively change after 10 years of use and not even after DOT-date. Afte 6 years, yearly profesional checkup, especially on aging...
Forum: Winnebago Class A Motorhomes 04-09-2020, 03:25 AM
Replies: 29
Views: 3,579
Posted By jadatis
Tireman 9 already wrote to your satisfaction, but...

Tireman 9 already wrote to your satisfaction, but this " Dutch Pigheaded selfdeclared tirepressure-specialist" wants to give his input too, for what it is worth. No professional in tires, yust one of...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 10-17-2019, 05:20 AM
Replies: 16
Views: 1,867
Posted By jadatis
Realise that , the more things you put on, the...

Realise that , the more things you put on, the more things can fail. Then for tires, you might yust create pressure-loss, by all the hoses and sensors you screw on them.
In the end your attention...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 10-17-2019, 03:48 AM
Replies: 16
Views: 1,867
Posted By jadatis
Dual used tires need higher pressure to...

Dual used tires need higher pressure to compensate for roadcurve, but because axle-weight devided over 4 tires, dont always need max allowed pressure of tire.

An extreme fictiv example:
If...
Forum: General Maintenance and Repair 09-12-2019, 01:15 AM
Replies: 10
Views: 1,798
Posted By jadatis
Is it realy time to chanche the tires? Is it...

Is it realy time to chanche the tires?
Is it because the treath is worn out, or yust the age.
Tires of this sise are made to last 10 years or more.
Michelin advices to let your tires be checked...
Forum: Running Gear, Axles, Brakes, Wheels and Tires 06-24-2019, 03:49 AM
Replies: 8
Views: 2,187
Posted By jadatis
I am able to calculate a highest pressure for the...

I am able to calculate a highest pressure for the load , at which comfort and grip is still acceptable. But also a save lowest pressure for the load and speed used, at which no overheating of any...
Showing results 1 to 50 of 64

 
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