IW505 tyre pressure and collicking horse? Is there a connection?

helen75

helen75

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Hello,

I don't post here often but I know there are plenty of very knowledgable folk on here that may be able to shed some light on a recent incident.

Firstly, Can anyone tell me what tyre pressure they normally have in there IW trailers?

I had my trailer serviced last week and they said my tyres were under inflated. They re inflated them back up to 65PSI (as indicated by the inner door sticker of the trailer).

Whilst driving home from the garage I thought the trailer seemed very 'bouncy' and each pot hole was met with quite a thud - I'm sure it wasn't like this when I drove it there (empty of course).

I thought nothing of it and took my horse out on saturday morning and he travelled very badly and collicked as we arrived at our venue. On our journey, yet again, the trailer seemed more 'bouncy' and the noise from the trailer if we hit a drain/hole in road was more obvious than ever before.

There is just no give in the tyres and I'm just wondering if 65psi is too much? Has anyone else had this problem?

Now I'm not saying this has caused the colic - just wondering if my ever so sensitive TB got stressed by the change in conditions....

Thoughts much appreciated!!
Hx
 
The correct tyre pressures in my 510 are 60 psi (sticker inside of groom's door) but this only applies to the original tyres. It was pointed out on another thread that you need to check that the tyres that are currently fitted to your trailer are van tyres which need high pressure or have perhaps been replaced with cheaper car tyres - you should be able to read the recommended pressure on the sidewall of the tyres.

Check all of the tyres in case they vary! My 510 is bouncy when empty but much better with a load.
 
Thank you Tiddlypom!!! It all makes sense now!

I had new tyres fitted to the trailer a few years ago at a regular tyre place (ie not horse trailer). So after your reply, I called the tyre place and explained what had happened and he said it's a really common problem! Trailers are going for servicing and coming back with over inflated tyres!! I'm going to take the trailer to the tyre place tomorrow morning (on my way to pick up my poor horse from hospital!)so they can confirm and sort the problem :-)

Thanks again...
 
helen75 said:
I had my trailer serviced last week and they said my tyres were under inflated. They re inflated them back up to 65PSI (as indicated by the inner door sticker of the trailer).
Click to expand...
You need to have a stern word with the outfit that serviced your trailer, they should know to check the tyres as fitted, and not to rely on the recommendation from IW. Negligence, IMHO.
 
TBH I wouldn't use anything other than commercial grade tyres on a horse trailer. But that said, I prefer the PSI to be around 45 to 50 so that the ride is smooth for the horses.
 
Thanks 9tails.
I'm pretty sure I didn't have car tyres put on (OH who knows what he's doing went and got them fitted for me). We went to a reputable place that does commercial tyres as well as car tyres. I guess I'll find out more tomorrow.

Interesting to hear that you prefer to run your trailer tyres on less than recommended. It certainly makes sense to me after what I was feeling on Saturday xx
 
I registered to this forum to give you an anwer.
end 2007 I got hold of the formula that the European tyre makers use to determine advice pressure for lower then maximum load.
To make a long story short, use my latest Caravan/trailer-tyre-pressure-calculator, wich is multilinguall.
So pick English as language.
Then if you can produce the actual weight of the trailer with hors(es) it gives a pressure with some reserve even but not that much that things go bumping.
This is a thing I introduced and stated that if you use more then 85% of the loadcapacity that belongs to the pressure , there is still acceptable comfort and gripp.
And that is yust what its all about for you.
The spreadsheet goes in its additonal information even from 80% because it is meanth for trailers that dont have people or animal aboard. That info is about damage and bumping border weightdifference possible.

If you cant work it out , give the weights and configuration of trailer ( number of wheels and axles) and of tires the maximum load or loadindex and kind of tire ( probably C-tires D-load/8PR with maxloadpressure of 65 psi ) and I do the calculation and give a picture of it .

But if you want to try yourselfes first here the link to my public map of skydrive that belongs to my hotmail.com adress with same username as in this forum ( and any other of the many fora i described to).
https://skydrive.live.com/?cid=a526e0eee092e6dc#cid=A526E0EEE092E6DC&id=A526E0EEE092E6DC!348
From this link you can navigate my complete public map to also for instance the motorhome calculator wich has more possibities to play with the reserves.
To use a spreadsheet first download it by RIGHTCLICKING and then chose DOWNLOAD.
Other things go wrong like open in Excell or WEB APP or leftclicking.
After download and eventual virus-check , open it in Excell or Open Office CALC on your computer.

It might proove that your old used pressure is high enaug with even some reserve for things like , pressure loss in time, unequall loading R/L, misreadings of weight and pressure scales, etc.

Here a picture used for another forum as example
examplecaravantalk2.GIF
 
Thanks jadatis! I will have closer look at that.

But first, I am going to take my trailer to the tyre vendor for their opinion ( and hopefully deflate the tyres a bit) and then off to collect my boy from hospital. He's been given the all clear to come home :-D

Im feeling nervous about the trailer ride home though. .....
 
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